The world's most in-depth and scientific reviews of outdoor gear

The Best Backpacking Sleeping Bags of 2018

By Ian Nicholson ⋅ Review Editor
Thursday November 15, 2018
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If you're researching buying a new backpacking sleeping bag, you've come to the right place! We analyzed over 90 possible options before selecting the top-performing 17 models and directly comparing them via a rigorous testing regimen. Our testing was mostly conducted in the field during backpacking trips through the North Cascades and the Sierra. On these trips, we traveled through various temperature ranges and weather conditions to assess their performance and overall versatility. We put them on our scales to weigh them ourselves and measured their packed volume to give you the best resources available to make an informed decision on how each model compares to one another. Whether you're looking for solid overall performance, the lightest and most compressible option, something that feels as close to your bed at home as possible, or a budget pick, we have some great recommendations for you.


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Awards Editors' Choice Award Top Pick Award  Top Pick Award  
Price $450.00 at Backcountry
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$458.95 at Backcountry
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$299.73 at REI
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$390.00 at Backcountry
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$434.95 at Backcountry
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Pros Spacious and comfortable cut, extremely light weight, among the most compressible bags in our review, Made in the USA, extremely versatile, best feeling fabric in our reviewLight for warmth, fantastic hood design, cozy internal fabric, incredibly compressible, nice foot box, sweet internal zippered pocketWarm for its temperature rating and overall super lightweight for its warmth, lighter than most 30°F models, extremely packable, cozy interior fabricLightweight, warmer than other 30F models, extremely compressible, fantastic feeling interior fabric, Made in the USA, zipper snags less frequently than other ultralight modelsLightweight, extremely packable, comfortable torso area dimensions, silky feeling fabric, sweet foot box
Cons Included stuff sack is a little big and doesn't compress it as small as it otherwise could be, expensiveSmall zipper is prone to catchingTighter than average internal dimensions, on the more expensive sideTighter than average interior dimensions, included stuff sack could offer better compressionNot easiest to ventilate, zipper snags fabric constantly, stuff sack doesn't compress bag well, so-so hood design
Bottom Line If we could only have one bag this would be it, as it's nearly the lightest and most packable model that offers spacious dimensions and above average warmth.One of the best overall sleeping bags on the market for its weight, warmth, and compressed size.If you are looking for a performance-oriented model but run on the cold side, this model is warmer than many 25F models while being lighter than most 30F.This superlight and extremely compressible model offers some of the best warmth to weight ratio of any option out there.This model is designed to be as light and packable as possible while still maximizing warmth and only making a few sacrifices to comfort, ease-of-use and overall versatility.
Rating Categories MegaLite Marmot Phase 20 Phantom Spark 28 SummerLite 32 Rab Mythic 400
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Specs MegaLite Marmot Phase 20 Phantom Spark 28 SummerLite 32 Rab Mythic 400
Total Weight (Pounds) 1.5 lbs 1.44 lbs 1.43 lbs 1.15 lbs 1.45 lbs
Fill Power 850+ Goose Down 850+ Fill Power Goose Down Q.Shield™ DOWN 800-fill 850+ down 900 Fill Down
Temperature rating (F) 30 F 20 F 28 F 32 F 19.5 F
EN lower limit (rating for men)/ EN Comfort Rating (rating for women) N/A Lower Limit: 18.5F/ Comfort 29.5F Lower Limit: 28F/ Comfort 38 F Lower Limit: 31F/ Comfort 40 F Lower Limit: 21F/Comfort 30F
Fill Weight (oz) 12oz (Down) 14.1 oz (Down) 10.1 oz (Down) 9 oz (Down) 14.z oz
Shell Material Weight fabric and weight (oz) 12D ExtremeLite Pertex 10D 100% Nylon Ripstop .88oz/yd 10D Bright Filament Plain Weave 20D Nylon Ripstop, DWR coating Pertex Quantum 7D
Water resistant down? No Yes Yes Yes Yes
Neck Baffle No No Yes Yes Yes
Small organization Pocket No Yes Yes (two kind of) No No
Zipper Length Full-length #5 YKK Zipper Full-length Full-length Full-length Half-zip
Shoulder Girth 64" 60" 59" 59" 72.8"
Hip Girth 56" 58" 53" 51" 27.5"
Foot Girth 39" Unknown 38" 38" 16"
Expand to show full ratings & specs  |  Hide details

Updated November 2018
We've just added the new ultra versatile The North Face One, the insanely light Rab Mythic 400, and the latest update to the solid all-arounder The North Face Cat's Meow. This review focuses primarily on sleeping bags geared towards backpacking and three seasons camping though many of these models are also great for car camping or summertime mountaineering. We have an array of Top Pick and Best Buy recommendations below that excel for specific needs and types of trips, and of course, check out our best overall recommendation, the Western Mountaineering MegaLite, which continues to dominate the field for our favorite do-everything. Once again, the Megalite wins our Editors' Choice award for its low weight, packed size, spacious dimensions, and warmth. If you want an ultralight sleeping bag or quilt, we've got you covered there too in a separate review. There is some overlap between these two categories.

Best Overall Model


Western Mountaineering MegaLite


Western Mountaineering Megalite 30
Editors' Choice Award

$450.00
at Backcountry
See It

Weight: 1.5 lbs | Fill Power: 850+ Goose Down
Roomy and cozy
Lightweight
Small packed size
Made in the USA
Versatility
Excellent fabric texture
Stuff sack doesn't compress well
High price

If we could only have one sleeping bag for backpacking, summertime mountaineering, and 3-season camping, it would no question be the Western Mountaineering MegaLite. It offers fantastic across-the-board performance, including the impressive combination of being one of the lightest and most compressible options while also being one of the roomiest. Spacious enough for car camping, it's also light enough for long-distance backpacking trips or other adventures where weight and packed volume is at a premium. It's spacious upper dimensions also mean it is one of the better options for tummy sleepers. The materials are silky smooth and feel the among the very best against our skin. All these attributes combined to make it one of the most versatile models and our testers' favorite choice for nearly any applications.

You can buy a lighter or a more comfortable bag, but not much lighter or much more spacious, and no other model combines these two performance characteristics as well. One of its only downsides is the price; at $450, it's one of the more expensive models in our review, but for the price, you get a bag that is made in the USA that will last two decades or more of use with just standard care. While there are many excellent backpacking sleeping bags out there, the MegaLite is the best of the best.

Read review: Western Mountaineering MegaLite

Best Bang for the Buck


REI Co-op Igneo 25


REI Igneo
Best Buy Award

$269.00
at REI
See It

Weight: 1.63 lbs | Fill Power: Water-repellent 700-fill duck down
Fairly light and compact
Solid quality for the price
Descent hood design
Versatile
Average warmth
Not super warm for its temperature rating
Tight around the legs

The REI Co-op Igneo 25 wins our overall Best Buy Award, as it offers the best overall performance for the price. It's a superb balance of quality materials creating low weight, and solid compressibility for a pretty unbeatable price. The Igneo isn't the cheapest option around (the $150 Kelty Cosmic Down wins in that category), but for $270, the Igneo checks in close to the performance of most high-end bags but a fraction of the price.

The only thing worth noting is our testers didn't find the Igneo lives up to its stated temperature rating. While it felt warmer than most 30F, the 25F rating is pushing it. The 60" shoulder width is about average, tapering to 55" at the hips, and the legs felt unnecessarily tight. We did love some of the little features though, like the durable shell and non-snagging zipper. Overall, this is a stand-out backpacking sleeping bag, with solid materials, specs, packed size, and a respectable 700 down-fill, all for an excellent price.

Read review: REI Co-op Igneo 25

Best All-Around 20F Model


Marmot Phase 20


Top Pick Award

$458.95
at Backcountry
See It

Weight: 1.44 lbs | Fill Power: 850+ Fill Power Goose Down
Lightweight yet warm
Very compressible
Silky internal fabric
On the warmer side of many 20F bags
Side zipper catches more than most
Expensive

A few years ago when Marmot updated their backpacking sleeping bag line with their at-the-time-new Phase series, they didn't hold anything back where quality or performance was a concern. The culmination of that is the Phase 20, which easily is one of the nicest sleeping bags of its temperature rating on the market. This bag sports top-quality 850+ down fill and some of the lowest weight shell fabrics you can find. This combination equates to one of the lightest and most compressible bags (for its respective warmth) currently available. A bonus is that the bag has an exceptionally well-designed hood and sports some of silkiest feeling internal fabrics we've tested.

The Phase topped our rating metrics in almost every category and was just a hair below our Editors' Choice winner in our overall scoring. The only (tiny) thing is our review team didn't care too much for was the zipper, which is small and easily one of the most prone to catching. The shoulder and hip girths (60" and 59" respectively) are in line with other performance-oriented mummy bags, yet significantly less roomy than the MegaLite. It's also on the expensive end of the spectrum, but it sure does deliver for the price.

Read review: Marmot Phase 20

Top Pick for Fast and Light Adventures


Western Mountaineering SummerLite 32


Western Mountaineering SummerLite 32
Top Pick Award

$390.00
(7% off)
at Backcountry
See It

Weight: 1.15 lbs | Fill Power: 850+ Goose Down
Best warmth-to-weight ratio in review
As warm, or warmer than, many 30° F models
Extremely compressible
Comfortable fabric
Made in the USA
Zipper snags less frequently than other ultralight models
Expensive
Tighter than average

The Western Mountaineering SummerLite is perfect for any backcountry adventure where pack space and every ounce carried is at a premium. This model is designed to be as warm, light, and as compressible as possible without sacrificing any basic functionality, though it certainly won't win many buyers in the comfort-first crowd. It is among the very lightest and most compressible models both in our review and on the market today but remains reliably warm, something many other superlight bags begin to slim the margins of.

It achieves its impressively low weight without resorting to shaving grams of insulation and marginalizing its temperature rating by offering slim, thermally efficient dimensions, plenty of super high quality 850+ down fill, and a constructing utilizing some of the nicest (and lightest) fabrics currently available. Another nice bonus is that it's 100% sewn and filled in San Jose, California. For more casual, all-around applications this bag is okay, but for long-range missions or summer alpine climbing where every ounce matters, this bag's warmth to weight ratio is tough to beat.

Read review: Western Mountaineering SummerLite

Top Pick for Wet Conditions


The North Face Hyper Cat 20


The North Face Hyper Cat 20
Top Pick Award

$179.21
(25% off)
at Backcountry
See It

Weight: 1.88 lbs | Fill Power: Synthetic "Heatseeker"
Small packed size for a synthetic bag
Light for a synthetic bag
Center half-zipper
Cozy interior fabric
Synthetic insulation isn't super long lasting
Lower warmth

The North Face Hyper Cat 20 is our Top Pick for Wet Conditions. During our water saturation testing, the Hyper Cat, like other synthetic-fill bags, dried in roughly 20% of the time as treated water-resistant down, making it a much more ideal bag for wet conditions. However, what truly sets the Hyper Cat apart from most other synthetic bags is how incredibly small it packs down and how lightweight it is for its temperature rating (1 lb 14 oz). It's lighter and more compressible than several down bags we tested, and it even has roomier than average dimensions. All of our testers loved its half-length center zipper that still allowed plenty of ventilation on warm nights. It was also just plain easier to use.

This wasn't a particularly warm-for-the-rating bag, and there is noticeably less insulation in the legs than in other models. It's how it achieves some of the additional weight savings and compressibility compared to other synthetic models. If you're looking for a synthetic bag, whether for wet conditions, animal rights concerns, or you have allergies to down and want one of the highest performing synthetic bags out there, the Hyper Cat is your bag.

Read review: The North Face Hyper Cat 20

Best Buy on a Tight Budget


Kelty Cosmic Down 20


Kelty Cosmic Down 20
Best Buy Award

$109.95
(35% off)
at Amazon
See It

Weight: 2.81 lbs | Fill Power: 600 Fill
Bargain-pricing but still down-filled
Light and compact for its price range
Very comfortable
Heavy
Not super warm
Too roomy

The affordable, yet reasonably light and compressible Kelty Cosmic Down 20, wins our Best Buy Award for those on a tight budget. While hardly an overall top performer, this is the best down bag we've ever seen for $170. This bag is far more durable and compressible than its similarly-priced synthetic insulated counterparts and offers beginning or budget-conscious backpackers an exceptional value.

It's about a pound heavier than other 20-degree bags in our review, so you'll have to ask yourself what's more important: a one pound weight savings on the trail, or a few hundred more dollars in your wallet? And even though it's rated to 20F, it isn't that warm, so if you are a cold sleeper or usually camp in lower temperatures, you'll want something warmer. For most backpackers, though, it is more than adequate. Otherwise, everyone on a budget should consider the Cosmic Down 20 (and pocket the savings). If you are backpacking in warm summer conditions and want to shave a few more ounces, check out the Cosmic Down 40 as well.

Read review: Kelty Cosmic Down 20

Top Pick for Cold Temperatures (AKA the warmest 20F model)


Western Mountaineering UltraLite


Western Mountaineering UltraLite
Top Pick Award

$485.00
(3% off)
at Backcountry
See It

Weight: 1.81 lbs | Fill Power: 850+ Goose Down
Toasty
Impressive weight
Zipper doesn't catch
Compresses well
High price
Not for summer
Draft collar velcro not secure
A bit tight

The Western Mountaineering UltraLite is an extremely toasty bag. By far the warmest model in our review, it is noticeably warmer than the other contenders we tested with a 20F rating. Even more impressive is that, despite being warmer than other similarly rated models, it was incredibly lightweight and compressible. It packs down pretty small in its stuff sack, but we were able to get it a third smaller with a good compression bag.

It's so warm that you might find it too much for mid-summer backpacking. It's also cut a little narrow (59" shoulders and 51" hips), making it a little less comfortable than a roomier bag. But, if you get cold easily, or plan to adventure in colder than average conditions, the Western Mountaineering UltraLite is tough to beat.

Read review: Western Mountaineering Ultralite

Top Pick for Exceptional Comfort


Sierra Designs Backcountry Bed 700


Top Pick Award

$239.95
(4% off)
at Amazon
See It

Weight: 1.93 lbs | Fill Power: 700 Fill Power PFC-Free Dridown
Incredibly comfortable
Ideal for side and tummy sleepers
Excellent price for a down bag
Less than two pounds
Non-traditional design is not for everyone
Inefficient stuff sack

The three-season Sierra Designs Backcountry Bed 700 bag has a unique design, creating one of the more comfortable and bed-like feels of any sleeping bag we have ever tested. This 35-degree contender does not have any zippers or Velcro flaps; instead, it has a huge U-shaped opening covered by a down flap, which acts as a quilt. This quilt/flap is a cozy way to close your bag, and it helps regulate temperature well, particularly on warmer nights. The best part is the unmatched freedom of movement for your upper extremities, making tummy or side sleepers, who may tuck their arms under a pillow or jacket, about as comfy as possible. There's also a lower opening for your feet, so if they need to "breathe" at night for you to sleep well, you can pop them out of the bag with ease. It also has a sleeve for your sleeping pad, which helps keep you on your pad if you toss and turn a lot. This bag has so many features that it's hard to list them all.

On the downside, it's not a very warm bag. While it worked well at its 35F rating, on colder nights you'll want something warmer. It weighs just under 2 pounds, which is excellent, but not that light for a 35F bag. Finally, this bag doesn't compress that well. These points might all be mute if you dread "sleeping" in a sleeping bag. The Backcountry Bed gives you the feeling of home on the trail, and we loved how comfortable it is.

Read review: Sierra Designs Backcountry Bed 700

3-in-1 Versatile Value


The North Face The One



$288.95
at MooseJaw
See It

Weight: 4.25 lbs | Fill Power: Water-repellent 800-fill down + Heatseeker Guide synthetic insulation
Three fully functional sleeping bags for the price of one
Exceptional value
Solid hood design
Very comfortable dimensions
Not super warm for each of its' temperature ratings
Not very compressible
High weight

It is hard to get more value than The North Face One because of its unique design that packs in three separately rated sleeping bags for the price of one. This three-in-one design is a three-part design which is based around a common lower half along with two interchangeable uppers rated to 40F (synthetic insulation) and 20F (800-fill down) degrees respectably that when used together create a 5F bag worthy of winter camping. While gimmicky sounding at first (and trust us, we were skeptical), The One is exceptionally well executed and pulls off the 3-in-1 design well. It's also quite comfortable with a U-shaped zipper.

This model's primary downsides are directly related to all the design aspects that make this 3-in-1 bag work, which all generally makes it heavier and less packable than a majority of the competition. There's a lot more zipper and fabric to this model, add to its weight and size significantly. However, if you don't have the money or the space for multiple sleeping bags, this one covers the vast majority of conditions that most folks are likely to encounter. Aptly named, this could be The One for you.

Read review: The North Face One sleeping bag


Analysis and Test Results


Your backpacking sleeping bag is likely the most important insulating layer that is carried on any overnight wilderness excursion as well as likely providing the best warmth-to-weight ratio of anything in your pack. After shelter, sleeping bags make up the next largest portion of pack weight and available space of any other piece of gear or clothing in your pack. Thus investing in a quality backpacking sleeping bag that is well-suited to your needs will have a significant impact on your backcountry adventure in addition to how good your night's rest will be. And nowadays, sleeping bags aren't just for backpacking and mountaineering; they are also the preferred bed of choice for car campers, travelers, backcountry skiers, winter campers, and couch surfers.

If on a budget  try not to skimp too much on quality - look for a bag that suits your needs  and balances warmth  weight  and versatility. If possible  consider two bags  a lower priced sleeping bag for car camping and a lightweight option for backpacking and mountaineering. Photo: Sunrise on Mt. Baker  Shannon Ridge  North Cascades  Washington.
If on a budget, try not to skimp too much on quality - look for a bag that suits your needs, and balances warmth, weight, and versatility. If possible, consider two bags, a lower priced sleeping bag for car camping and a lightweight option for backpacking and mountaineering. Photo: Sunrise on Mt. Baker, Shannon Ridge, North Cascades, Washington.

We have over eight years of testing the best backpacking sleeping bags on the market under our belt. Our expert testers go to the extreme to field test each model we include in our review for months on end. We weighed them ourselves, packed and unpacked them, zipped and unzipped them, and of course, slept in all of them to evaluate their comfort, assess their dimensions, and compare any other features or design aspects that added or detracted from their overall performance. We then rate each bag on its warmth, weight, packed size, features, sleeping comfort, and versatility. Below you can read about our testing of each comparison metric and the specifics of each category.

Value and the best sleeping bag for the money are a delicate balance of performance versus price and performances can come in two fashions. The first it can come by having one or more stand-out qualities like being particularly light or compact while the other could come in the way of versatility where a given model would prove itself useful for a wide range of activities.
Value and the best sleeping bag for the money are a delicate balance of performance versus price and performances can come in two fashions. The first it can come by having one or more stand-out qualities like being particularly light or compact while the other could come in the way of versatility where a given model would prove itself useful for a wide range of activities.

Value


If you're on a budget, absolute performance pales in comparison to performance-per-dollar. Value isn't incorporated into our scoring matrix, but we know it is in yours. Our individual reviews do comment on our interpreted value for each model, though. Not surprisingly, there's a gradual upward curve where the scores tend to increase with price. But this isn't always the case - we often come across overly-expensive outdoor items that don't live up to the hype, or price tag, or conversely the diamond in the rough that far out-performs its price.


With backpacking sleeping bags, a higher price tag usually trickles down from a higher-quality fill and lighter, high tech materials. When looking for a good value pick, cross-reference the bags' scores with their price. Some great options for their price include the Sierra Designs Backcountry Bed 700 ($250) and the REI Co-op Igneo 25 ($270), which won our Best Buy Award.

Warmth is an important factor when buying a sleeping bag. All the bags we tested were rated to between 20-35 degrees  with most of them being closer to 30 degrees F.
Warmth is an important factor when buying a sleeping bag. All the bags we tested were rated to between 20-35 degrees, with most of them being closer to 30 degrees F.

Warmth


Warmth is mostly a product of how much amount of loft (AKA insulation) a bag has, measured in the thickness of the insulation between you and the external environment. Except for loose fitting bags, which are far less thermally efficient, more volume of insulation (not necessarily weight) equals more warmth in the vast majority of cases.


The fit or the cut of the bag is the next most important factor in determining warmth. Models that are too tight or too short won't allow the insulation to loft up correctly and as a result; may feel colder when pressed against specific areas. More importantly, if a bag is too large or its dimensions are too roomy, it will take longer for your body heat to warm all the drafty dead air spaces. Closely related is the limited heat your body produces, which will be spread too thin in a broader cut, thermally inefficient model. This effect can leave you feeling cold even though, on paper, a given model might have more insulation than a narrower cut model but still won't feel as warm.

The WM MegaLite features 13 ounces of high quality 850+ fill and was one of the warmest 30F bags we tested.
The WM MegaLite features 13 ounces of high quality 850+ fill and was one of the warmest 30F bags we tested.

Some bags tested in this review, such as the Western Mountaineering UltraLite and SummerLite, have tighter interior dimensions, resulting in slimmer feeling cuts. Not to fear, most broad-shouldered folks can still at least wear a lightweight insulated jacket while sleeping inside these bags to boost the temperature rating on colder nights. The rest of the bags we reviewed are wider dimensionally speaking, and a majority of people could wear a mid, or even heavier-weight jacket (or two) to boost insulation on even colder nights. It's worth noting that Western Mountaineering sleeping bags are available in multiple lengths and widths, which is a huge advantage because you can get a bag that fits your body well. Look at the foot, hip, and shoulder circumference to compare dimensions for unisex bags. We've included these measurements in the specification tables found in each review when available from the manufacturers.

Shown here are the European ratings  which are printed on the inside of a sleeping bag. These ratings are slightly more objective than the typical US ratings but do have some inconsistencies. In theory  the EN lower limit is a rating for men and the EN Comfort Rating is a rating for women.
Shown here are the European ratings, which are printed on the inside of a sleeping bag. These ratings are slightly more objective than the typical US ratings but do have some inconsistencies. In theory, the EN lower limit is a rating for men and the EN Comfort Rating is a rating for women.

The warmest contenders for their respective temperature rating were the high-quality down bags from Western Mountaineering, notably the MegaLite, and SummerLite and Ultralite. The Marmot Phase 20 followed closely behind the models mentioned above. All of these bags have 850+ fill power down and plenty of it. While we didn't feel it excelled at any one rating, the 3-bags-in-1 The One sleeping bag offers two separate layers rated to 40F and 20F that when combined produced a rating of 5F offering the greatest versatility of warmth that we have ever seen.

The Phase 20 was easily one of the warmest 20° F bags we tested. The only model that was warmer was the Western Mountaineering Ultralite  though it's worth noting that the difference in warmth between these two bags was minimal. The Phase is slightly lighter and more compressible.
The Phase 20 was easily one of the warmest 20° F bags we tested. The only model that was warmer was the Western Mountaineering Ultralite, though it's worth noting that the difference in warmth between these two bags was minimal. The Phase is slightly lighter and more compressible.

The least warm bags based on their given temperature ratings were the Marmot Phase 30, the Mountain Hardwear HyperLamina Spark 35 and the Patagonia 850 Down 30. The thinner insulation and sewn through the design of the Patagonia 850 offers less protection from the elements. The lack of a draft tube allows more cold air inside the bag, leaving it less toasty than others. That said, both of these models are excellent options when sleeping at 40°F and above.

To provide a better review during our testing phase  we performed several directly side-by-side tests. We compared each bag's warmth in relation to other bags of similar ratings. We also analyzed and contrasted each model's EU ratings  quality and volume of fill  and dimensions.
To provide a better review during our testing phase, we performed several directly side-by-side tests. We compared each bag's warmth in relation to other bags of similar ratings. We also analyzed and contrasted each model's EU ratings, quality and volume of fill, and dimensions.

It's worth noting that warmth is also heavily influenced by conductive heat loss to the ground. Choosing an appropriate sleeping pad is essential, especially in colder conditions or when sleeping on snow. Our Best Sleeping Pad Review will point you in the right direction for a warm, comfortable pad. Choosing the right backpacking tent or ultralight shelter for your trip will also influence the perceived warmth of a sleeping bag.

While sleeping bags are foundational to staying warm during overnight stays in the backcountry  100% of sleeping bags are designed to be used in conjunction with a sleeping pad and no model will perform anywhere close to its published rating without one.
While sleeping bags are foundational to staying warm during overnight stays in the backcountry, 100% of sleeping bags are designed to be used in conjunction with a sleeping pad and no model will perform anywhere close to its published rating without one.

OutdoorGearLab also has an excellent Backpacking Tent Review and Ultralight Backpacking Shelter Review, where you can finish out your research on the best sleeping/shelter kit for your next trip. Keep in mind that warmth degrades over time, especially if the bag is not cared for. We recommend educating yourself on proper storage and care.

We carefully logged the temperatures we slept in overnight to best compare how accurate we felt each models ratings were. We into account if we were in a tent with another person (warmest)  in a tent solo  or out under the stars as well as how much we were forced to wear in order to stay warm.
We carefully logged the temperatures we slept in overnight to best compare how accurate we felt each models ratings were. We into account if we were in a tent with another person (warmest), in a tent solo, or out under the stars as well as how much we were forced to wear in order to stay warm.

We tested these bags in traditional backpacking type shelters including both classic three season and single wall tents, silk-nylon tarps, and under the open sky on warm nights and a handful of open bivies above tree-line on exposed alpine ridges. See the Buying Advice on how standardized testing has helped (or hurt!) manufacturers' decisions on what temperature rating to give a sleeping bag. Keep in mind that EN comfort ratings are conducted in a lab and not real-world conditions. That helps explain how two bags rated 30 degrees can not have the same warmth in the real world.

In climbing and mountaineering  and perhaps even more than long-distance hiking  weight is an important factor. You may have to make challenging technical moves with the weight of your sleeping bag on your back. Photo: An open bivy with the MegaLite under the stars while climbing the North Ridge of Forbidden Peak.
In climbing and mountaineering, and perhaps even more than long-distance hiking, weight is an important factor. You may have to make challenging technical moves with the weight of your sleeping bag on your back. Photo: An open bivy with the MegaLite under the stars while climbing the North Ridge of Forbidden Peak.

Weight


The weight metric is as simple as it gets, though arguably among the most important qualities for any human-powered activity. The biggest factors in this category included insulation, zippers, material quality, and internal dimensions as well as other features.


In general, heavier bags use either synthetic insulation (which is weightier than down) or lower quality fill-power down (500-700) which is less lofty for a given weight. In short, more insulation must be used to obtain a certain level of loft (warmth) compared with higher quality down where less insulation can achieve the same loft/warmth. A majority of the highest performing bags use the best down (800-900 fill-power) along with lightweight, ultra-thin shell fabrics. A bag's cut and its overall dimensions also play a major factor in a given models weight as a slimmer cut bag not only require less overall materials, but are also nearly always more thermally efficient, and thus requires slightly less insulation to achieve a given temperature rating.

The Spark III is on the more expensive side  but if you want a 3-season bag on the warmer end of the spectrum and still want a lightweight  packable bag  this model is hard to beat.
The Spark III is on the more expensive side, but if you want a 3-season bag on the warmer end of the spectrum and still want a lightweight, packable bag, this model is hard to beat.

At 1 pound 1.6 ounces, the Marmot Phase 30 is the lightest bag in our review though it faces a host of close competition. While it wasn't the warmest 30F bag we tested, we still found it more than suitable for most backpacking and summertime mountaineering trips. The Western Mountaineering SummerLite is only a hair heavier but noticeably warmer (if our testers could quantify it, we would call it 5F warmer) than the Phase 30. The SummerLite is able to do this by sporting slightly more insulation and slimmer internal dimensions. If you run on the cold side of 30F, we'd recommend the Mountain Hardwear Phantom Spark 28, which was as warm as several of the 25F models but only weighed 1 lb 6.5 ounces.

The Phase 30 offers a low weight and excellent compressibility. While it certainly wasn't the warmest 30F bag out there  it wasn't far off and was almost half-a-pound lighter than its closest competition. Photo: Tracey Bernstein wakes up in Red Rocks Nevada after a cold Fall night.
The Phase 30 offers a low weight and excellent compressibility. While it certainly wasn't the warmest 30F bag out there, it wasn't far off and was almost half-a-pound lighter than its closest competition. Photo: Tracey Bernstein wakes up in Red Rocks Nevada after a cold Fall night.

The Sea to Summit Spark III and the Rab Mythic 400 are also both crazy light for the warmth they provide and their respective temperature ratings. As a result, it is no surprise the both these models feature tiny gauge 1/3 length zippers and some of the lightest shell fabrics in our review with 10D for the Spark III and a review-thinnest 7D for the Mythic along with fairly slim dimensions.

What is so impressive with both the Marmot Phase 20 and the Western Mountaineering MegaLite is that they are a fair amount roomier and a touch warmer while only a misly two ounces heavier. The Marmot Phase 20 is unbelievably light for its temperature rating (20F), featuring top quality 850+ down and a similar 10D shell. The MegaLite (1 lb 8 oz) offers a full-length zipper, is comparable warmth to the Spark III but is much more spacious (but still not so roomy to be thermally efficient).

The longer and more ambitious your backpacking objective is  the more important spending a little extra to buy a lighter weight sleeping bag becomes. Here  two lightweight backpacking bags out for a side-by-side comparison along the John Muir Trail.
The longer and more ambitious your backpacking objective is, the more important spending a little extra to buy a lighter weight sleeping bag becomes. Here, two lightweight backpacking bags out for a side-by-side comparison along the John Muir Trail.

While the Marmot Phase 20 is light, the Western Mountaineering UltraLite is warmer and one of the lightest in our review (at 1 lb 13 oz). In addition to being incredibly lightweight, all of these models also score high for warmth.

The Phase 20 is one of the best 20F bags on the market. While expensive  it lives up to its price point  offering top-notch materials  insulation  and design - at a very low weight.
The Phase 20 is one of the best 20F bags on the market. While expensive, it lives up to its price point, offering top-notch materials, insulation, and design - at a very low weight.

Among synthetic bags we tested, our review team was thoroughly impressed with The North Face Hyper Cat. While it's not super warm for its temperature rating, at 1 pound 14 ounces, it was warm enough to be used to 20-25°F while wearing a layer or two. It's an exceptionally lightweight synthetic option and is a pound+ lighter than a lot of synthetic models out there - it's also lighter than several 30°F down bags. This is where The North Face One isn't that sweet. While its 3-in-1 design is innovative, all the extra zippers and doubled up layers of fabric make it the heaviest model in our review.

Weighing sleeping bags for our OutdoorGearLab's best backpacking sleeping bag test. There was a pretty big range in weights  with some options weighing half of what other models weighed.
Weighing sleeping bags for our OutdoorGearLab's best backpacking sleeping bag test. There was a pretty big range in weights, with some options weighing half of what other models weighed.

Comfort


Comfort is a subjective category that depends on a combination of internal dimensions, the user's sleeping style, and a bag's interior fabric. Increasing the size of the bag's internal dimensions (to a point) allows for a more comfortable bag for most, as the user has more room to move around and spread out. This trait becomes even more important for users who prefer to sleep on their sides or stomachs.


How worth it is having more internal space? The answer is not linear. As a bag is made larger, manufacturers will need to add more material and insulation to maintain the same warmth, with the primary disadvantage coming in weight and packability.

Three of the most comfortable and roomiest backpacking sleeping bags in our review. From left-to-right: the Sierra Designs Backcountry Bed 600 (updated to the 700)  Nemo Salsa 30 (no longer available)  and Western Mountaineering MegaLite.
Three of the most comfortable and roomiest backpacking sleeping bags in our review. From left-to-right: the Sierra Designs Backcountry Bed 600 (updated to the 700), Nemo Salsa 30 (no longer available), and Western Mountaineering MegaLite.

In addition to having the space for sprawling and thrashing, our ratings focus on which features will contribute to, or detract from comfort. Insulation type influences comfort; all of our testers agreed that sleeping in a high-quality down bag is like floating on a super light cloud while zipping into a synthetic model is fine, but no-doubt less heavenly.

Another cool feature that affects the comfort of a bag is having a single half-length zipper in the center of the bag. This design is featured on the North Face Hyper Cat (shown here) and the Patagonia Down 850 30 F sleeping bag. While this design isn't quite as functional for regulating temperature  our entire testing team loved it. In fact  cooking while still in your sleeping bag made for a great morning of hanging out and drinking coffee.
Another cool feature that affects the comfort of a bag is having a single half-length zipper in the center of the bag. This design is featured on the North Face Hyper Cat (shown here) and the Patagonia Down 850 30 F sleeping bag. While this design isn't quite as functional for regulating temperature, our entire testing team loved it. In fact, cooking while still in your sleeping bag made for a great morning of hanging out and drinking coffee.

The Sierra Designs Backcountry Bed 700 is the most comfortable bag in our review, with the semi-rectangular Nemo Disco 30 being a very close second and the MegaLite and The One also scoring well.

Tracey Bernstein taking advantage of the Backcountry Bed 700 comforter style flap while side and tummy sleeping in the Nevada desert.
Tracey Bernstein taking advantage of the Backcountry Bed 700 comforter style flap while side and tummy sleeping in the Nevada desert.

First the Sierra Designs Backcountry Bed 700, which provided our testers with the most bed-like feel of any backpacking sleeping bag we have ever seen. The Backcountry Bed doesn't have a single zipper or Velcro flap of any kind. Instead, it's designed with a large "U"-shaped opening that is covered with a down flap. This down flap acts (and feels) like a quilt. This not only helps regulate temperature exceptionally well but also offers unmatched freedom of movement in the user's upper extremities.

You can see the flap-style closure design featured in this bag. This flap acts like a comforter  letting its occupant tuck themselves in as if they were in a bed. It also allows its users to sleep in most positions comfortably but still wraps around efficiently enough to maintain a comfortable amount of warmth. This flap features two handwarmer sleeves to help keep its user warm.
You can see the flap-style closure design featured in this bag. This flap acts like a comforter, letting its occupant tuck themselves in as if they were in a bed. It also allows its users to sleep in most positions comfortably but still wraps around efficiently enough to maintain a comfortable amount of warmth. This flap features two handwarmer sleeves to help keep its user warm.

Best of all, this model weighs a respectable 1 pound 15 ounces. While we loved the Backcountry Bed 700 and found that it offers a mega comfort-oriented design, its lower dimensions are average and not as spacious as the WM MegaLite. The inner fabric of the Backcountry Bed is also not quite as comfortable as those found on the Megalite.

This was our review teams' unanimous favorite for being the most comfortable for tummy and side sleepers. In this photo  tester Ian Nicholson is sleeping on his stomach with his right knee straight out to the side  a common position of comfort for belly sleepers.
This was our review teams' unanimous favorite for being the most comfortable for tummy and side sleepers. In this photo, tester Ian Nicholson is sleeping on his stomach with his right knee straight out to the side, a common position of comfort for belly sleepers.

The Nemo Disco replaces the old Salsa and is one of the best backpacking sleeping bags for folks who prefer to sleep on their sides or their stomach. The Disco is a semi-rectangular bag that features an hour-glass cut rather than the traditional taper of a mummy bag. This design allowed tummy-sleepers to pull their knee to mid-height comfortable. While there are many broad bags, the Disco strikes a delicate balance between comfort and weight and is still reasonable enough that most backpackers wouldn't even hesitate to carry it.

The spacious cut Cosmic Down (right) offers above average leg room and is an excellent option for tummy and side-sleepers of for folks who just want a little more room. Shown compared to the Western Mountaineering MegaLite (left) and Western Mountaineering UltraLite (center).
The spacious cut Cosmic Down (right) offers above average leg room and is an excellent option for tummy and side-sleepers of for folks who just want a little more room. Shown compared to the Western Mountaineering MegaLite (left) and Western Mountaineering UltraLite (center).

The MegaLite offers wider-than-average dimensions but what makes it unique is it's significantly lighter and more packable than the two contenders above, nearly as comfortable, and still among the lightest and most compressible of any model in our review. The North Face One isn't particularly light but is among the roomiest bags we tested and its "U"-shaped zipper mean regulating temperature and getting the perfect tension are among the easiest in our review. The Kelty Cosmic Down is also spacious and quite comfortable despite its lower-quality fabrics.

Tracey Bernstein  shown here in The One sleeping bag(s)  which is one of the roomiest models we tested. The U-shaped zipper allows its user to unzip this model from both sides.
Tracey Bernstein, shown here in The One sleeping bag(s), which is one of the roomiest models we tested. The U-shaped zipper allows its user to unzip this model from both sides.

Lastly, it's important to consider total comfort throughout a trip, not just when you're inside your sleeping bag at night. A bag that's slightly more comfortable to sleep in may be far heavier and bulkier, and therefore less comfortable to carry. Weigh both factors and keep them in mind when searching for a new bag.

Comfort is not only represented when you are inside your sleeping bag.Because you're carrying your pack most of the day  weight and packed size also play a huge role in your comfort during the day.
Comfort is not only represented when you are inside your sleeping bag.Because you're carrying your pack most of the day, weight and packed size also play a huge role in your comfort during the day.

If you spend more time carrying the bag than you do inside of it, we suggest prioritizing weight and bulk (comfort while in your pack) over comfort while sleeping. The Marmot Phase, Rab Mythic 400, Patagonia 850, and REI Co-op Igneo 25 were also top scorers for the comfort metric with respectable weights. We especially enjoyed how both of the Marmot Phase models provided an excellent hood design, which allowed us to stay cozy without feeling claustrophobic.

Packed size is an obviously important comparison and a quality several backcountry travelers put an equal emphasis on as a product's weight. This is because a sleeping bag is one of the larger individual items we take into the backcountry and the fact that the difference between models can be quite great.
Packed size is an obviously important comparison and a quality several backcountry travelers put an equal emphasis on as a product's weight. This is because a sleeping bag is one of the larger individual items we take into the backcountry and the fact that the difference between models can be quite great.

Packed Size


Packed size is how compressible a given model is. Overall compressibility is most heavily influenced by down quality (fill power) or type of synthetic insulation, shell fabrics, bag-dimensions, and features. Higher quality down, lighter fabrics, and simple features create the most compressible bags.


Everyone wants a more compressible bag, as it either gives us more room in our pack or lets us take a smaller, lighter weight pack for a given objective. Every model we tested comes with a stuff sack or compression sack. While some were fine, most were not, meaning they did a poor job at minimizing the packed volume of each bag. Bigger stuff sacks have the advantage of being easier to compress the sleeping bag into. However, for the extra 10-20 seconds of effort, every single tester would rather have a more compressed sleeping bag. Stuff sacks are slightly lighter than compression sacks, but compression sacks do a far better job at minimizing packed volume and in our opinion are worth the extra 2-3 ounces in saved packed space.

Comparing the compressed sized of all the sleeping bags in the review. The Sea to Summit Spark III was the most pack-able with the Western Mountaineering MegaLite and Marmot Hydrogen being only marginally larger. The Kelty Tuck 20 and the Sierra Designs Backcountry Bed were the least compressible.
Comparing the compressed sized of all the sleeping bags in the review. The Sea to Summit Spark III was the most pack-able with the Western Mountaineering MegaLite and Marmot Hydrogen being only marginally larger. The Kelty Tuck 20 and the Sierra Designs Backcountry Bed were the least compressible.

The most compressible bags in our review are the Phase 30 and SummerLite, closely followed by the Sea to Summit Spark III and Mountain Hardwear Phantom Spark 32, and Rab Mythic 400. It is worth noting that both Sparks come with some of the better compression sacks of any model we tested.

To make a more accurate comparison between the bags  we compared each bag's compressibility  both in its included stuff sack and in an (often better-fitting) aftermarket compression sack  since that's the route most people are going to take.
To make a more accurate comparison between the bags, we compared each bag's compressibility, both in its included stuff sack and in an (often better-fitting) aftermarket compression sack, since that's the route most people are going to take.

All of these bags are 10-15% smaller than the Western Mountaineering MegaLite, Western Mountaineering Ultralite, and Marmot Phase 20, which did compress impressively small among 20°F bags.

A compression sack while slightly heavier than a stuff sack does a much better job at minimizing the volume a sleeping bag will take up in your pack. A few of the models we tested came with solidly performing designs most weren't that great and we needed to buy an aftermarket version.
A compression sack while slightly heavier than a stuff sack does a much better job at minimizing the volume a sleeping bag will take up in your pack. A few of the models we tested came with solidly performing designs most weren't that great and we needed to buy an aftermarket version.

Versatility


Three-season models are meant to be used across spring, summer, and fall and are built to handle the wide range of conditions potentially found within those seasons. They must function to not overheat their user on warm summer nights at lower elevations, as well as to provide warmth when the temperatures drop below freezing near treeline in the early spring and later into fall.


Versatility across environments, elevations, seasons, and temperatures is an important consideration when selecting a bag as well as the types of trips you'd like to embark on. Some of the bags tested here, such as the WM Ultralight and WM MegaLite have continuous horizontal baffles that allow you to shift down from the top to the bottom of the bag, increasing comfort in warm conditions and warmth in cold conditions. While this is cool, no model offers as much versatility across climates than The North Face The One sleeping bag. Its three-in-one design allows this bag to function as a 40F bag, a 20F bag, and a 5F bag. While this versatility does come with a weight penalty, having one sleeping bag that can work well across such a broad range of temperatures could easily be worth it to some people.

There is a lot of debate about goose down versus duck down. While goose down generally offers a higher quality because it often comes from older  larger birds  this isn't necessarily always the case. You just don't see it as much because there just isn't as much high-quality goose down out there as duck down. Photo: The Western Mountaineering UltraLite out for an extended early season trip in the High Sierra.
There is a lot of debate about goose down versus duck down. While goose down generally offers a higher quality because it often comes from older, larger birds, this isn't necessarily always the case. You just don't see it as much because there just isn't as much high-quality goose down out there as duck down. Photo: The Western Mountaineering UltraLite out for an extended early season trip in the High Sierra.

Other features that increase a bag's versatility is an ability to vent on warmer nights, meaning a longer zipper offers more versatility than a 1/3 length one. A little extra shoulder room to facilitate adding one (or more) layers can also be helpful on those colder adventures.

When assessing each bag's versatility  we gave higher scores to bags that allowed for better ventilation on warm nights and enough space to add layers on colder evenings.
When assessing each bag's versatility, we gave higher scores to bags that allowed for better ventilation on warm nights and enough space to add layers on colder evenings.

The Backcountry Bed 700 incorporates a built-in quilt that enables you to sleep as you would with a comforter. It also regulates temperature fantastically when compared with a traditional side zipper. The quilt can be tucked away wholly, engulfing its occupant when temperatures near the bag's comfort limit. Plus, there is ample room to layer up in both of these models, and you can open the bag up for warmer nights.

Rebecca Schroeder testing 3-season bags over a wide range of conditions on Mammoth Terraces  El Captain Yosemite CA.
Rebecca Schroeder testing 3-season bags over a wide range of conditions on Mammoth Terraces, El Captain Yosemite CA.

The North Face Cat's Meow is a budget-friendly bag that offers an exceptional amount of versatility and works well for shorter backpacking trips, car camping, and has been used by FAR the most times by OutdoorGearLab review staff on the side of El Cap (likely more than 50 ascents collectively).

Generally speaking  we have a slight preference for down for most backpacking and mountaineering trips as it is often lighter  more compressible  and offers superior longevity. However  we frequently reach for a synthetic bag for wet coastal hikes  kayaking adventures  and big wall climbing. So while we have a slight preference for down  a synthetic bag could be better for the climate/conditions you're traveling in  or if you want to support ethical animal rights or have allergies to down. Testing a Cat's Meow and a Hyper Cat while kayaking in Washington's San Juan Islands.
Generally speaking, we have a slight preference for down for most backpacking and mountaineering trips as it is often lighter, more compressible, and offers superior longevity. However, we frequently reach for a synthetic bag for wet coastal hikes, kayaking adventures, and big wall climbing. So while we have a slight preference for down, a synthetic bag could be better for the climate/conditions you're traveling in, or if you want to support ethical animal rights or have allergies to down. Testing a Cat's Meow and a Hyper Cat while kayaking in Washington's San Juan Islands.

Besides excelling at shorter trips in the backcountry, the Cats' Meow and The North Face Hyper Cat are great options for car camping, kayak or rafting trips, or any occasion in which versatility is paramount. As synthetic bags, they handle wet weather much better than their down counterparts, remains warmer when wet and drying out faster.

Despite its overall pretty minimal design  the Phase features a small internal zippered pocket. While this pocket was too small for a smartphone  it was a great place to keep a watch or a headlamp to help keep these items from getting lost in the dark.
Despite its overall pretty minimal design, the Phase features a small internal zippered pocket. While this pocket was too small for a smartphone, it was a great place to keep a watch or a headlamp to help keep these items from getting lost in the dark.

Features and Design


We assessed the usefulness of each model's features and attempted to quantify how well they contributed to each option's overall ease-of-use as well as its general performance.


This variable encompasses shell fabric, zippers (or lack-there-of), draft tubes, neck baffles, hood-design, stash pockets, and additional items included with the bag, like storage and compressions sacks.

The Western Mountaineering MegaLite (right) compared with the other widest/comfort oriented bags in our review: the Sierra Designs Backcountry Bed 3-Season (left) and the Nemo Salsa 30 (center). All of these bags were far more spacious than most and while they are fairly comparable in the torso area  you can see that the Salsa 30 offered the most room.
The Western Mountaineering MegaLite (right) compared with the other widest/comfort oriented bags in our review: the Sierra Designs Backcountry Bed 3-Season (left) and the Nemo Salsa 30 (center). All of these bags were far more spacious than most and while they are fairly comparable in the torso area, you can see that the Salsa 30 offered the most room.

Like many things in the outdoor world, not all bells and whistles are useful nor do they necessarily make a model perform better. They often add weight, increase bulk and in some cases reduce performance or add only negligible performance for a disproportionate about of weight.

Our testers assessed how useful and the quality of each bag's features and attempted to quantify how well they contribute to a bag's overall performance.
Our testers assessed how useful and the quality of each bag's features and attempted to quantify how well they contribute to a bag's overall performance.

Besides adding weight, complexity, or another potential failure point, manufacturers often attempt to charge more for feature-laden bags because they either perceive they have greater value or want the consumer to think the same. Nine times out of 10 in the world of sleeping bags, other than the basics, many additional features rarely offset the added weight and in reality, there isn't much effect on warmth, comfort, or convenience.

Some small features can be convenient  like The North Face Cat's Meow's zippered pocket; it's big enough for a smartphone or a watch  which is helpful in keeping it near your head for setting alarms.
Some small features can be convenient, like The North Face Cat's Meow's zippered pocket; it's big enough for a smartphone or a watch, which is helpful in keeping it near your head for setting alarms.

Take stash pockets on sleeping bags, for example. It can be helpful to keep your watch with an alarm in the pocket, but it can be hard to hear the alarm through the down. If you roll in your sleep, waking up on your watch isn't exactly comfortable. In general, when it comes to features, smart designs scored well, and generally, less is more.

The Spark III features a well-designed hood that helps capture heat with 14 ounces of 850+ fill power down. This bag is rated to 25F.
The Spark III features a well-designed hood that helps capture heat with 14 ounces of 850+ fill power down. This bag is rated to 25F.

The Sea to Summit Spark III and the Rab Mythic are both high scorers in our features and design metric, even though these bags aren't necessarily built with many "extras." The designs are well executed to be as lightweight as possible with a shorter length zipper, crazy light materials, etc.

Most 3-season bags are designed to offer features intended to be used over a broad range of conditions  from hot coastal hikes to summer-season above treeline adventures. Photo Day-3 of the Ptarmigan Traverse at White Rocks Lake Glacier Peak Wilderness.
Most 3-season bags are designed to offer features intended to be used over a broad range of conditions, from hot coastal hikes to summer-season above treeline adventures. Photo Day-3 of the Ptarmigan Traverse at White Rocks Lake Glacier Peak Wilderness.

Important Accessories


Unfortunately, very few bags come with decent quality stuff sacks, and many bags come with downright terrible stuff sacks. A couple of exceptions are the Mountain Hardwear Hyperlamina Spark 35, The North Face Hyper Cat, Sea to Summit Spark III, and the Hardwear Hyperlamina Phantom Spark 28 which all come with pretty nice compression sacks.

In general, we recommend purchasing a super lightweight compression sack to use over most models included stuff sack to maximize the compressibility of your bag. See our Best Sleeping Bag Stuff Sack Article for our recommendations for specific applications.

Most sleeping bags don't come with a very efficient compression or stuff sack. Because so much space can be saved in your pack (or allow you to take a smaller pack)  we'd recommend buying an aftermarket one.
Most sleeping bags don't come with a very efficient compression or stuff sack. Because so much space can be saved in your pack (or allow you to take a smaller pack), we'd recommend buying an aftermarket one.

Other Sleeping Bag Reviews


We also offer an Ultralight Sleeping Bag Review, which compares hoodless options, weighing only 31 ounces or less. If you're looking for a lightweight bag that will primarily be used for overnight trips where weight is a concern, we highly encourage you to consider one of the models found in the Ultralight Bag Review. For those of you heading into the cold, check out our review of the best down sleeping bags for winter camping and adventuring. In addition, we offer a general Camping Sleeping Bag Review that compares large and luxurious rectangular bags that are too heavy to carry backpacking. These offer much more comfort than any model tested here and cost as little as forty dollars!! And of course, we also have a review of the best women's sleeping bags on the market.

The Sierra Designs Women's Backcountry Bed 800 (left) has more room for your arms to move around  whereas the Kelty Ignite is a more traditional mummy shape. Like unisex bags  women's bags come in many styles and configurations.
The Sierra Designs Women's Backcountry Bed 800 (left) has more room for your arms to move around, whereas the Kelty Ignite is a more traditional mummy shape. Like unisex bags, women's bags come in many styles and configurations.


Ian Nicholson