Western Mountaineering SummerLite 32 Degree Sleeping Bag

About This Item

Design and Details

  • Insulated draft tube protects you from cold air interrupting your precious slumber
  • 5 1/4" Spacing/Continuous Baffles that encircle the bag from zipper to zipper
  • 10 oz of down fill with 850 fill power
  • A narrow cut of 59/38" Shoulder/Foot girth maximizes heat efficiency
  • 1 lb 3 oz total weight makes this Western Mountaineering's lightest bag with continuous baffles
  • 4" of Loft and rated at 32° F
  • Full-length #5 YKK Zipper
  • Brand : Western Mountaineering
  • Web ID: 23XFMASMMRLT32FXXCSL
ShapeMummy
Temp Rating32° F / 0° C
Weight5'6": 1 lb 2 oz; 6'0": 1 lb 3 oz; 6'6": 1 lb 5 oz
Insulation TypeDown
Fill Power850+ Power goose down
Fill Weight5'6": 8 oz; 6'0": 9 oz; 6'6": 10 oz
Shoulder Girth5'6": 59"; 6'0": 59"; 6'6": 60"
Hip Girth5'6": 51"; 6'0": 51"; 6'6": 52"
Knee Girth5'6": 38"; 6'0": 38"; 6'6": 38"
Shell Fabric12 Denier ripstop nylon outer
Zipper LocationLeft
Stuff Sack IncludedYes
Stuff Sack Size5'6": 6" x 12"; 6'0": 6" x 12"; 6'6": 6" x 12"

REVIEWS

4.6
100%
Recommended

11 Reviews

Verified Purchase

Awesome Purchase

bought this about two months ago for summer backpacking and am extremely pleased. quality is extremely high, temp rating seems very accurate, packs to size of a nalgene and it's ~ 1lb. very comfortable / cozy bag for the weight. its not inexpensive - but you definitely get what you pay for. WM bags are top notch, this is my 2nd and i've had the 1st one (versalite, 2 lb 15 deg) over 12 years and taken it everywhere - this one is lighter, smaller and more suitable for summer here - only reason i bought it.

Verified Purchase

5’11” 205lbs With A Puffy Jacket

Arm space is a little tight, but I still felt comfortable and had *just* enough room to shift positions throughout the night as a 5’11” 205lbs guy wearing a nano puff jacket. I was at ~ 7,500’ on a 30° night with a mild breeze and intermittent rain/sleet sleeping on packed snow, inside a custom Borah bivy, on top of a ThermaRest NeoAir Xtherm, and under an HMG dyneema tarp. I’m a moderate/cool sleeper with colder feet, but the only loss of heat I noticed was from the thin baffle covering the zipper near my thighs. Bottom line: great bag, even for a bigger guy like me.

Received incentive

Still Love It, 4 Years Later

Bought this (here) four years ago. Used it down to about 32 degrees, and I was comfy with my baselayers, warm socks, and an ultralight down jacket. My feet get slightly cold in here, but not enough to keep me awake. For the weight, this thing is incredible. Roomy enough for me to side sleep (5'10", 145). The zipper is pretty good, occasionally gets stuck on the draft tube, but that seems expected. I worked overtime to get this bag, and it was worth every minute. The hood cinches down nicely and holds in so much heat vs leaving it open.

Verified Purchase

Best Cocoon Ever

I bought this for my best friend recently, after having a western mountaineering sleeping bag myself for the past 4 years. I'm glad to report that he has already slept in it numerous times on the trail and at home, much to his wife's dismay. These are the coziest most comfy sleeping bags money can buy. Your life will be changed upon buying and sleeping in this new bag. Made in America and even came with a sweet signed card of the nice people who did the sewing on the bag.

Verified Purchase

Good For High-altitude Thru-hiking

I recently used this bag for a thru-hike of the Colorado Trail (490 miles, avg elevation of 10,300' msl), and it performed flawlessly for what it is. For a one-pound mummy bag it was very packable, light, and decently warm. The finish workmanship are flawless. I say "decently warm" because although this is stated as a 32-degree bag, even with a Patagonia R1 hoody, tights, and socks, most night I was cold by about 3-4 in the morning. Those nights ranged between 25-35 degrees F, so I would say this is closer to a 40-degree bag. But, everyone is a bit different so keep that in-mind. For what it is, it is outstanding but if you're gonna be in sub-32 degree nights, I would suggest layers and/or a liner. The outer shell is light, as expected, so be gently with it, as expected with any ultra-light gear.

Awesome Bag! A Bit Too Snug For Me.

I wanted to love this bag, it's a great bag, but after 3 nights in the sawtooth mountains (mid July) I knew I had to look for something different. The bag itself was incredible. Ultra light, sleek, simplistic design but it just was too small. I am a fairly built guy and just needed a bit more space. My shoulders are broad enough that it would compress the down and I'd get cold spots. I'm a warm sleeper buy first two nights of my trip (again mid July in Idaho) I didn't put the fly on my tent, the temperature dipped into the lower 40's upper 30's and I got cold. The last night I put the fly on the tent and the temperature only dropped into the 40's and I stayed toasty warm. This bag has no neck baffle and the draw string to close your head box is off center and felt a little awkward to me. That being said it may not bother someone else at all. If you're lean and don't move much at night, this might be the perfect summer bag, but if your broad and like to have a little more wiggle room this may not be what you're looking for.

Great Quality But Not Sure About The 32f Rating

I first used this bag in July in the Pecos Wilderness. Low temps were around 40F and I had to put on all my clothes to stay warm enough to sleep. But the bag is very high quality, plenty of room, zipper works great, and hood is well-designed.

One Of The Lightest!

I love this sleeping bag! So much I wish it it had holes for my feet and arm so I could walk around like a mummy in it lol. Now being more serious, it's warm and comfortable. Packs down nicely. Full length double zipper perfect when needing to cool toasty toes. Also I'm 6ft on the nose. A regular bag works perfectly. If I were two inches taller I'd want the longer one.

A Worthy Investment

I bought this bag to use during the warmer months of my A.T. thru-hike. This bag is extremely lightweight for its warmth, and I saw very few bags that could match it on the trail. Sure people had bags that weighed the same or less, but when we got to the Whites and Maine they had to switch out for a heavier warmer bag. Not me. Paired with the Western Mountaineering sleeping bag liner, I was comfortable right down to the rating in this thing. Western Mountaineering is a fantastic company that will take care of you if you have any issues with their product, which you won't, because they are so awesome. After spending 100+ nights in this bag it still lofts up like it did when it was brand new. I couldn't be happier with my purchase.

Verified Purchase

Everything I Had Hoped For.

This bag is incredible. Warm, ultralight, compresses super small. Wonderfully made in the USA.

Verified Purchase

Served Me Well

I am a Scout Master, I recently took my older scouts along with one adult advisor to the world famous Philmont Scout Ranch in the mountains of northern New Mexico. The bag was easy to pack and light to carry. I combined the bag with a silk liner and stayed comfortable in the back country.

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