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Exped MegaSleep Duo 25 Review

We never felt completely warm on colder nights, be we are very impressed with this bag's weight and packed size.
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Price:  $220 List | $219.00 at REI
Compare prices at 2 resellers
Pros:  Very lightweight, simple, dual temperature ratings, could be used for backpacking
Cons:  Thin, a little gimmicky, lacking overall warmth, almost too basic
Manufacturer:   Exped
By Jason Wanlass ⋅ Review Editor  ⋅  Nov 8, 2019
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RANKED
#10 of 12
  • Warmth - 35% 3
  • Comfort - 25% 6
  • Features - 25% 7
  • Packed Size - 15% 9

Our Verdict

The Exped MegaSleep Duo 25, is a large, simple, two-person bag designed to keep campers warm in a variety of temperatures. Specifically, its two-sided design provides two thicknesses of microfiber insulation. Keep the dark blue side up for colder nights and light blue side up for warmer temps. This bag is incredibly thin and lightweight and is compressible enough to use for backpacking as well as car-camping. Exped is known for its very simplistic outdoor gear designs, which is this bag's greatest feature. However, we wanted to find out if less really is more when it comes to car camping, and if the MegaSleep's minimalistic design is worth the extra dough.


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Awards  Editors' Choice Award Editors' Choice Award Top Pick Award  
Price $219.00 at REI
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$168.99 at Amazon$128 List$144.95 at Amazon
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$90.35 at Amazon
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Pros Very lightweight, simple, dual temperature ratings, could be used for backpackingMassive/luxurious bag, several unique features, hearty zipper, exceptionally warm, removable cotton liner, convenient zip-on tote bagVery warm, well-crafted, tons of features, soft and cozy, adjusts well to different temperature rangesDurable design, completely zipperless, lots of practical features, seemed warmer than 35-degree ratingVersatile layering system, extremely warm and comfortable
Cons Thin, a little gimmicky, lacking overall warmth, almost too basicExpensive, not water-resistant, cream-colored interior prone to stains, very large packed sizeGrabby liner, may be confining to larger body typesNarrow design may not fit two larger bodies, extra effort to get into its stuff sackLess water-resistant, bulky, fabric is a little grabby
Bottom Line We never felt completely warm on colder nights, be we are very impressed with this bag's weight and packed size.If you're willing to shell out the bucks, this bag will not disappoint; it's pure luxury - almost like sleeping in your own bed.This bag is warm, soft, and has lots of features and configuration options.This bag has no zippers, tons of features, and could fool you into thinking you were in your own bed.This bag has more layering options than any bag we've studied, offering many options for a large temperature range.
Rating Categories Exped MegaSleep Duo 25 Slumberjack Country Squire 0 TETON Sports Polara 3-in-1 Frontcountry Bed 35 Duo All-Weather Multi-Layer
Warmth (35%)
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9
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8
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7
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8
Comfort (25%)
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6
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8
Features (25%)
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9
Packed Size (15%)
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Specs Exped MegaSleep... Slumberjack... TETON Sports... Frontcountry Bed... All-Weather...
Temp Rating (F) 25 degrees 0 degrees 0 degrees 35 degrees 0 degrees
Measured Weight (lbs) 4.4 lbs 12.2 lbs 8.3 lbs 8.2 lbs 10.1 lbs
Style 2-person Rectangular Rectangular Rectangular Rectangular
Draft Tube Full length Full length Full length Full length Full length
Neck Baffle No No Yes No No
Shell Material 40D ripstop nylon 12 oz. Cotton Duck Taffeta 50D polyester ripstop Brushed polyester
Lining Material 42D nylon Poly-Cotton Inner bag: 100% Brushed Poly Flannel
Outer bag: PolarLite Fleece
68D polyester taffeta Brushed polyester
Insulation Synthetic Slumberloft Synthetic Insulation SuperLoft Elite Hollow Fiber Synthetic Polyester
Measured Size L x W 80" X 58" 84" X 42" 82" X 36" 87" X 50 " 76" X 34"
Warranty 5-year Lifetime Lifetime Lifetime 5-year

Our Analysis and Test Results

Touted as one of the lightest and most compressible double bags on the market, one thing is sure about the MegaSleep — it's certainly minimalistic. Comprised of fabric, zippers, and insulation, and not much else, this bag comes with virtually no frills. Its simplistic design is a common style for manufacturer Exped. At first glance, this bag doesn't seem like much. However, there are some key functional design features that makes this simple bag versatile and appealing. The MegaSleep is actually four bags in one, and it can adjust to temperature swings by simply being flipped over. Additionally, the bag employs a microfiber insulation, which is much thinner than standard synthetic fill used in most sleeping bags.

Performance Comparison


We did warmth tests with one person and with two people. As anticipated  the bag did stay warmer with two people. We also like that it was relatively comfortable and easy to move around in.
We did warmth tests with one person and with two people. As anticipated, the bag did stay warmer with two people. We also like that it was relatively comfortable and easy to move around in.

Warmth


Generally speaking, the bottom side of sleeping bags do very little to keep you warm. It's the top quilt (above your body) that does most of the insulating, while a sleeping pad provides insulation from the cold earth. Exped took this knowledge to the next level by creating a bag with two distinct sides. Insulation in the bag's light blue side is thinner and should be side up on warmer nights. The bag's thicker, more insulated, dark blue side can be placed above for cooler nights. A thinner, more compact microfiber insulation (similar to a microfiber towel) is used in this bag, making it incredibly compressible and lightweight for its size. However, does it insulate as well as typical polyester fill? For us, it didn't.

A simple snap in the middle of the bag's opening is a brilliant and easy solution to minimizing the loss of body heat. When combined with drawstring cinches  this bag effectively keeps heat in.
A simple snap in the middle of the bag's opening is a brilliant and easy solution to minimizing the loss of body heat. When combined with drawstring cinches, this bag effectively keeps heat in.

Overall, we found the MegaSleep to perform as it was designed: Light blue side for warmer nights, the dark blue side for colder temps. The bag really does work as intended. However, we don't feel the bag performs up to either of its temperature ratings. We do feel the thinner, lighter microfiber insulation is effective when compared solely to its volume. Still, we never felt completely warm when temperatures inched closer to the bag's ratings. In short, when using the bag's warmer side, we survived through temps in the 30s, but never felt toasty warm enough to completely relax.

The bag's darker blue side has twice the thickness of microfiber insulation. We did find that it insulated more effectively than the thinner light blue side.
The bag's darker blue side has twice the thickness of microfiber insulation. We did find that it insulated more effectively than the thinner light blue side.

Additionally, we conducted warmth tests on the MegaSleep first with one person and then with two. We did find that we stayed warmer with two bodies, but still found our overall warmth to be lacking. Overall, this unique form of insulation is effective and, in fact, somewhat amazing when considering its volume. However, we feel the bag's performance is quite a bit shy of its 25-degree rating, even when wearing extra clothing.

In the end, we were very impressed with the MegaSleep's warmth when compared to its thickness and weight. However, we were not impressed with its listed temperature ratings. Simply put, users who seek minimalistic designs will love how simple and lightweight this double bag is, but they will most likely need to layer up or seek destinations with a little warmer nighttime temps.

This bag is super thin. The insulation is similar to a microfiber towel  leaving the bag with virtually no loft.
This bag is super thin. The insulation is similar to a microfiber towel, leaving the bag with virtually no loft.

Comfort


Thick, heavy, and extra cozy? Nope. This bag is thin, no matter how you zip it. Using a sleeping pad with a higher R-value is recommended, except in truly warm summer nights. However, this bag's width and silky fabric create a very spacious, airy, and comfortable feel. The bag is easy to move around in, and its fabrics are nice to the touch. When compared to other double bags with the same dimensions, we found the MegaSleep to accommodate two sleepers more easily with less a tug-of-war for covers. We feel the thinner nature of the bag, combined with its silkier fabrics create this perception. If a traditional, overstuffed, flannel interior is what you desire, you won't find it here. But for space and weight conscious adventurists, this bag just may hit the mark.

The manufacturer also produces the MegaMat Duo 10, which is a perfect fit for the MegaSleep.

We found the bag's top-opening cinch cords to be strange  counter-intuitive  and in the way.
We found the bag's top-opening cinch cords to be strange, counter-intuitive, and in the way.

Features


The MegaSleep's two-sided design is its most stand-out feature. We were pleased to have our skepticism challenged when discovering the bag really does work. Both sides do provide different levels of insulation and warmth. However, as already noted, temperature ratings on both sides are a bit generous. The MegaSleep is incredibly lightweight for a double bag, and it's highly compressible. These key features give users the option of taking this bag just about anywhere, including the backcountry (as long as nighttime temps are 35-40 degrees or above). Of the double bags we've tested, this is the best one for traveling further afoot.

Although very thin  this bag's outer shell material is quite water-resistant. It didn't wet out when testing in the snow.
Although very thin, this bag's outer shell material is quite water-resistant. It didn't wet out when testing in the snow.

Another notable design feature is the bag's ability to be four bags in one. As a double bag, it offers two warmth ratings, but each half can also be unzipped and used as separate quilts or zipped into two separate bags. The only thing we didn't like is each separate quilt or bag also has a separate warmth rating, which could be a problem if both are being used in the same temperature range (flip a coin?). We also feel the individual bags are a little narrow and maybe confining for larger-framed sleepers.

An additional simple feature we liked was a snap at the bag's top opening, which allows sleepers to snap the middle of the bag together and reduce heat escape. It also comes with a generous, reinforced zipper baffle.

This bag can be placed into its normal storage sack or easily crammed into a compression sack for backpacking.
This bag can be placed into its normal storage sack or easily crammed into a compression sack for backpacking.

Packed Size


We've studied a lot of double bags, and we can securely say that this bag is one of the lightest and most compressible of any we've tested. The manufacturer ships the bag in an over-sized, mesh-sided stuff sack, which is perfect for storing; however, if needed, this sleeping bag can be easily smashed into a compression sack and reduced to more than a third of its normal packed size. Making it perfect for space-conscious campers or weekend backpackers who like the idea of sharing a sleeping bag.

The down-filled Kelty Galactic (single bag) has the smallest packed sized we've seen in traditional camping bags. Next to it is the MegaSleep Duo in a compression sack  followed by the MegaSleep in its normal storage bag. Like we've already said  this bag packs up very well.
The down-filled Kelty Galactic (single bag) has the smallest packed sized we've seen in traditional camping bags. Next to it is the MegaSleep Duo in a compression sack, followed by the MegaSleep in its normal storage bag. Like we've already said, this bag packs up very well.

Value


The MegaSleep is the lightest, most compact double bag we've tested. Most of this is accomplished by using thinner microfiber insulation. We found this insulation to work well as long as temperatures stayed on the warmer side. Additionally, we initially thought the bag's two-sided, dual-temperature design was a gimmick, but later found it is quite effective. In the end, despite all of the pluses, we feel the bag is overpriced. It's a unique bag with some desirable features, but warmth is our most important metric, and we don't feel the MegaSleep measures up to its temperature ratings. Less is often more, but more money for less warmth just isn't good math, in our opinion.

We tested this bag in warm and not-so-warm conditions. We don't think it measures up to its temperature ratings.
We tested this bag in warm and not-so-warm conditions. We don't think it measures up to its temperature ratings.

Conclusion


As the lightest double bag we've ever seen, we are also very impressed with the MegaSleep's compressibility. It can easily make the switch between car-camping and backpacking. This bag performs well for its volume and weight. The microfiber insulation is an effective take on insulation. We simply feel the bag didn't keep us as warm as its temperature ratings stated.

Certainly not the warmest single or double bag we've tested. However  this bag is surprisingly warm for its overall volume. It simply doesn't measure up to its own temperature ratings in our opinion.
Certainly not the warmest single or double bag we've tested. However, this bag is surprisingly warm for its overall volume. It simply doesn't measure up to its own temperature ratings in our opinion.


Jason Wanlass