Reviews You Can Rely On

Therm-a-Rest Vesper 32 Review

A comfortable and lightweight quilt for summer hiking
gearlab tested logo
therm-a-rest vesper 32 ultralight sleeping bag review
Credit: Backcountry
Price:  $400 List
  • 1
  • 2
  • 3
  • 4
  • 5
Manufacturer:   Therm-a-Rest
By Ethan Newman ⋅ Review Editor  ⋅  Nov 4, 2019
66
OVERALL
SCORE


RANKED
#7 of 18
  • Warmth - 30% 6.0
  • Weight - 25% 8.0
  • Comfort - 20% 7.0
  • Versatility - 15% 6.0
  • Features - 10% 5.0

Our Verdict

The Therm-a-rest Vesper 32 is a lightweight quilt that is functional without many frills. Thermarest has been getting more into the sleeping bag game in the past few years, and we think they're getting better. The Vesper is really lightweight and really packable. It's a bit warmer than the bags of similar weight since it doesn't have to spread the down around as much. The hydrophobic down is a nice plus as well and is showing up more and more in new bags. While it's not the warmest bag, it is a quality, lightweight quilt that works well for what it is.
REASONS TO BUY
Super lightweight
Water-resistant down
Nice fabric
REASONS TO AVOID
Could use a second attachment strap
Snap sometimes comes undone

Compare to Similar Products

 
Awards  Editors' Choice Award Editors' Choice Award Best Buy Award Best Buy Award 
Price $299.89 at Backcountry
Compare at 3 sellers
$469 List
$469.00 at Feathered Friends
$450.00 at Backcountry
Compare at 2 sellers
$320 List$200 List
Overall Score Sort Icon
66
73
71
69
57
Star Rating
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
Pros Super lightweight, water-resistant down, nice fabricHighest scoring ultralight sleeping bag, best features, and most versatileWarmth-to-weight ratio, excellent fabric, best bag with a hood, versatileVery affordable, highly customizable, versatile, lots of featuresVery inexpensive, versatile, good feature set
Cons Could use a second attachment strap, snap sometimes comes undoneNot as warm as others (in the version we tested), neck draw cords loosen over timeTight fit, shallow hood, expensiveLong wait for product to be custom made and shipped, foot box draw cord still leaves a little hole, lots of buttons and strapsNot as warm as similar quilts, doesn't seal at the bottom very well
Bottom Line A comfortable and lightweight quilt for summer hikingThe highest scorer because of its versatile design that allows it to be a fully opened blanket or a fully zipped hoodless mummyA stellar choice for those looking for a warm, lightweight, fully hooded mummyOffers the versatility of sleeping under it as a blanket or fully wrapped up, with a huge range of customizable optionsA quilt with good features at an unbeatable price
Rating Categories Therm-a-Rest Vesper 32 Feathered Friends F... Western Mountaineer... Enlightened Equipme... Hammock Gear Econom...
Warmth (30%)
6.0
7.0
9.0
9.0
6.0
Weight (25%)
8.0
5.0
5.0
4.0
2.0
Comfort (20%)
7.0
7.0
6.0
6.0
7.0
Versatility (15%)
6.0
10.0
8.0
8.0
8.0
Features (10%)
5.0
10.0
7.0
8.0
8.0
Specs Therm-a-Rest Vesper 32 Feathered Friends F... Western Mountaineer... Enlightened Equipme... Hammock Gear Econom...
Manufacturer Stated Temperature Rating 32F 40F 32F 20F 20F
Measured weight, bag only (ounces) 15.0 oz 19.1 oz 19.0 oz 20.9 oz 25.0 oz
Stuffed Size 5" x 6" 7" x 10" 6" x 12" 7" x 12" 6" x 10"
Stuff Sack Weight 1.7 oz 0.8 oz 1.0 oz 0.6 oz 0.6 oz
Manufacturer Claimed Weight 15.0 oz 20.0 oz 19.0 oz 20.2 oz 22.2 oz
Fill Weight 9.0 oz 8.4 oz 10.0 oz 13.0 oz 13.2 oz
Shell Material 10D nylon ripstop Pertex Endurance UL 100% nylon ripstop 10D nylon fabric 20D nylon taffeta
Fill Power 900 fill 950+ goose down 850+ goose down 850 Downtek 800 fill duck down
Style Quilt Center zip mummy bag or unzip for quilt Hooded mummy Quilt Quilt
Construction No hood, no zipper Continuous baffles Continuous baffle U-shaped baffled quilt Box baffle consruction
Shoulder Girth 58" 62" 59" 55" 55"
Hip Girth 51" 48" 51" 55" 50"
Foot Girth 38" 39" 38" 55" 45"
Zipper Length No zipper Full-length center zip Full-length 1/3-length at bottom 1/3-length at bottom
Sizes Regular, long Regular, long, and wide 5'6", 6', and 6'6" Short/regular, regular/regular, regular/wide/ long/wide Short, standard, long, wide-short, wide-standard, wide-long
Temp Options (degrees Fahrenheit) 32, 20F 20, 30, 40F 32F 10, 20, 30, 40F 0, 10, 20, 30, 40F

Our Analysis and Test Results

In general, we like the Vesper. The construction is well thought out, and we liked the hydrophobic down. Make no mistake, though, this is an ultralight quilt, and we had to plan accordingly for a clothing system to match. Nine ounces of down isn't a lot for a 32-degree bag, and while it is distributed smartly, there are warmer quilts in the review.

Performance Comparison


therm-a-rest vesper 32 ultralight sleeping bag review - testing out the vesper 32 while cowboy-camping in the southwest utah...
Testing out the Vesper 32 while cowboy-camping in the Southwest Utah desert.
Credit: Ethan Newman

Warmth


For what it is, the Vesper 32 ain't bad when it comes to warmth. It's certainly not as warm as similar quilts we tested, but it does well with the nine ounces of down it has. On the inside of the Vesper 32 is a small tag listing the "comfort" and "limit" ratings, as per the EN ratings. Many manufacturers list their bags as the "limit" rating being the primary rating to pay attention to, whereas most users think in terms of "comfort". Going off this understanding, we think the Vesper 32 would more accurately list its comfort rating at 41 degrees.

The down is thicker in the top of the quilt and a bit thinner on the sides so as to insulate where heat is lost the most. Between the differential down and the pad attachment, it actually makes a passable seal between the pad and quilt, unless you flop around a lot at night. With a second pad attachment strap, the seal would be a touch better and warmer.

therm-a-rest vesper 32 ultralight sleeping bag review - the vesper 32 fills the center of the quilt more fully than the...
The Vesper 32 fills the center of the quilt more fully than the sides, so as to maximize the down's effectiveness and minimize weight.
Credit: Ethan Newman

Weight


At 15 ounces, the Vesper 32 is one of the lighter bags in the review. Most of the weight is also in the down fill, which is 9 out of the fifteen ounces, which means there isn't a lot of excessive fabric. It also packs down pretty small, and for the packing-obsessed ultralight hikers who want overnights with a daypack, you could probably get there with the Vesper.

therm-a-rest vesper 32 ultralight sleeping bag review - the vesper 32 is impressively light and packable at 15 ounces, but...
The Vesper 32 is impressively light and packable at 15 ounces, but the compression sack made concerning ripping noises when we tightened it down. Not an issue if you simply stuff this bag into the bottom of your pack sans sack.
Credit: Ethan Newman

Comfort


For how light this thing is, it's quite comfy. The 10D nylon fabric is plenty soft, and the slipperiness of it doesn't catch on fleece clothing. The Synergylink Connector strap and the snap at the collar are both low profile enough that we didn't notice when we were laying on them. We wished the foot box was a bit wider, but it was satisfactorily deep so our feet didn't slide out when rolling around at night.

therm-a-rest vesper 32 ultralight sleeping bag review - the thermarest vesper has two different places where the...
The Thermarest Vesper has two different places where the Syngergylink Connector can be attached to strap the pad to the quilt, but only one connector. With a second connector the seal between the two would be better.
Credit: Ethan Newman

Versatility


The Vesper does well but not in a ton of situations. It's really more of a summer quilt, where the nights won't dip down below about 40°. We wouldn't be too thrilled about taking this out for nights around freezing, although you could probably make it work if motivated. However, this probably wouldn't be our first choice for a trip with really variable conditions or longer trips like a through hike.

therm-a-rest vesper 32 ultralight sleeping bag review - the vesper 32 dried out fairly quickly after a wet night in a single...
The Vesper 32 dried out fairly quickly after a wet night in a single wall tent, where our testers dealt with a lot of condensation.
Credit: Ethan Newman

Features


The Vesper 32 is a mixed bag when it comes to features. The pad attachment system was easy to use, but it would have been better if it came with two Synergylink Connectors, as there are two places to attach them. They also can't be cinched for chillier nights. Also, the snap on the back of the collar came undone occasionally during the night.

therm-a-rest vesper 32 ultralight sleeping bag review - we liked the connection system for the synergylink connectors, but...
We liked the connection system for the Synergylink Connectors, but we wished there was a second one, and that they were adjustable.
Credit: Ethan Newman

The draft collar and drawstring work pretty well and stayed put all night, and the hydrophobic down is a nice touch. We liked that it came with a compression stuff sack, but it felt really flimsy and we could hear the stitching pop a bit when we tightened it down.

therm-a-rest vesper 32 ultralight sleeping bag review - the vesper 32 fabric didn't seem to have as strong a dwr coating as...
The Vesper 32 fabric didn't seem to have as strong a DWR coating as some of the other bags we tested, but it did dry out fast.
Credit: Ethan Newman

Value


The price is midrange in the review. For its price, it's a pretty good deal for the weight savings, at the cost of some warmth. We think it's hard to beat the two Best Buy Award winners Hammock Gear Burrow Econ and the Enlightened Equipment Revelation for value, but if weight savings is an absolute must, the Vesper might be worth looking into.

Conclusion


There's a lot of good things about the Therm-a-Rest Vesper 32. It's really light, and we liked the differential fill with hydrophobic down. We wish it was a little warmer (or better labeled), and a few minor design tweaks would have raised the score. Still, if your main concern is weight and you're looking for a summer quilt, the Vesper is a pretty good option.

therm-a-rest vesper 32 ultralight sleeping bag review - letting the down uncompress before a night out in the utah hills. we...
Letting the down uncompress before a night out in the Utah Hills. We recommend unpacking your bag well before crawling into it so that it has time to regain its loft (and therefore maximize its warmth).
Credit: Ethan Newman

Ethan Newman
 

Ad-free. Influence-free. Powered by Testing.

GearLab is founded on the principle of honest, objective, reviews. Our experts test thousands of products each year using thoughtful test plans that bring out key performance differences between competing products. And, to assure complete independence, we buy all the products we test ourselves. No cherry-picked units sent by manufacturers. No sponsored content. No ads. Just real, honest, side-by-side testing and comparison.

Learn More