Western Mountaineering Puma GWS

2 reviews
5-star:   2
4-star:   0
3-star:   0
2-star:   0
1-star:   0


short regular long
Weight 3 lb 9 oz / 1580 g 3 lb 12 oz / 1670 g 3 lb 15 oz / 1750 g
Fill weight 2 lb 2 oz / 965 g 2 lb 5 oz / 1050 g 2 lb 8 oz / 1125 g
Loft 9 in / 23 cm 9 in / 23 cm 9 in / 23 cm
Temperature rating -25 F / -32 C -25 F / -32 C -25 F / -32 C
Fill 850 fill-power down 850 fill-power down 850 fill-power down
Shape Mummy Mummy Mummy
Max user height 5 ft 6 in / 165 cm 6 ft / 180 cm 6 ft 6 in / 200 cm
Shoulder girth 62 in / 160 cm 64 in / 163 cm 66 in / 170 cm
Hip girth 55 in / 137 cm 56 in / 140 cm 57 in / 147 cm
Foot girth 39 in / 99 cm 39 in / 99 cm 39 in / 104 cm



If you're not willing to compromise, this is the bag…

Rating: rated 5 of 5 stars
Source: bought it new
Price Paid: $800


If you're not willing to compromise, this is the bag to get. True to its temperature rating, and the GWS shell keeps moisture out while allowing enough breathability to dry out some damp clothing at night.


  • Packability
  • Durability
  • Warmth


  • Takes some time to get stuffed down to size

Winter camping with this bag down to about -15°F and I've not had any issues with warmth while wearing silk long underwear. The loft is amazing and pops right up after unpacking.

I'm 5'11" and went with the 6' bag; I still have room to fit boot liners and clothing in the bag if necessary, and while I usually sleep on my back, I have no problem side sleeping either. The hood protects well and is comfortable, although I'd be interested to see how I like it compared to some of the Feathered Friends hood designs.

The zipper works well. It's still a sleeping bag zipper so you've got to guide it a little, but it's among the best I've used, and the full zip makes getting in and out easy.

I almost went with the MF shell, but the GWS shell felt like it could take a little more abuse, and I'm glad I went with the GWS because it does get moist in the tent sometimes and I've had no issues with moisture affecting the bag, even while drying out damp socks and shirts inside the bag at night; so breathability appears to be good with the GWS shell as well.

The bag packs down very well with a compression sack, but it's easier to turn it inside out and take your time.  I'd say I can get it down to the size of a rugby ball under regular camping circumstances.

I love this bag because it is simple, well-constructed and does its job perfectly. I expect it to last me many seasons of winter camping in Alaska. Just make sure you wash the damn thing every once in awhile.

I have a number of friends who wonder why their bags don't have any loft anymore, and it's because they've never  washed the thing even after years of use. Wash and rinse the hell out of it afterwards.

Disclaimer:  Gore Tex Mountain Techs Member


This is without question the best bag I`ve owned.

Rating: rated 5 of 5 stars
Design: mummy
Fill: 850
Temperature Rating: -25
Weight: 3 lb 10 ounces
Price Paid: $700

This is without question the best bag I`ve owned. The loft is incredible, also have a LITHIOM 0 that is a good bag but can't touch the PUMA for warmth and quality!

I am a farmer and it makes me proud to say that we can still do things right in this country! Spent a week in the Great Smokies at 10 below and was extremely content.

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Manufacturer's Description

Visit Western Mountaineering's Puma GWS page.

Retailers' Descriptions

Here's what other sites are saying:

To some people winter mountaineering is just a pastime. Be it searching for an uncut bowl to tele, a frozen waterfall to climb or a simple visit to the Brooks Range, the Western Mountaineering Puma Gore Windstopper has been there, done that! This sizable bag is lofted with down and roomy to boot! 37 ounces of 850+ fill power down lofts this bag to a full 9" for a rating of minus 25 below! A shoulder girth of 64" provides room to layer, store clothing or fit to big folk. The inside foot section is sewn with a 2.4 oz. fabric to protect the bag while stowing gear. And the Reverse Differential Hood is roomy, down filled and warm, and totally made with Gore Windstopper. The full down filled collar and both Interlocking Draft Tubes are also completely made with Gore Windstopper fabric. No place to cut costs! Few continents require anything warmer than the Puma Gore Windstopper!

- CampSaver.com

The sizable Western Mountaineering Puma GWS sleeping bag is what you want when it all gets real, on a high-altitude mountaineering trip. The 850+ fill power down lofts this bag to a full 9", for a warmth rating of minus 25 below! Few mountain ranges require anything warmer than the Puma Gore Windstopper(TM), and you'll be happy to have this portable furnace when you really need it. GORE Windstopper(TM) shell reduces the threat of condensation and moisture while remaining breathable The MicroLite XP(TM) shell has superior breathability while being extremely water resistant A slightly over-sized winter fit ensures comfort when extreme weather necessitates an extra layer or two A full 3-dimensional down filled collar full provides a protective seal from the bellows effect as you move about inside your bag Enjoy easy ventilation with a full-length #5 YKK Coil Zipper featuring two locking slider pulls for convenient access from inside or outside the bag Dacron(R) stiffening tape ensures smooth zipping and prevents zipper jams Robust interlocking insulated draft tube keeps heat from escaping through the zipper 9'' Loft provides luxurious warmth and compressibility 6'' spaced baffles allow maximum loft while preventing down migration V side block baffles ensure that insulation stays put and increases the number of down filled chambers to warm quicker DWR finish keeps moisture at bay even after multiple washings 64''/39'' Shoulder/Foot girth Stuff sack and large volume storage sack included Abrasion-resistant taffeta lines the inner foot box, allowing you to store gear or wear liners without compromising durability/li> Proudly made in the USA Closeout models have black fabric on the ground-facing side of the bag

- OMCgear

When all the three-season wieners store their camp gear for the winter, bust out the Western Mountaineering Puma Gore WS Sleeping Bag, and head into the mountains for a solo venture. From overnight ski tours to remote alpine climbs, the Puma beats back the cold thanks to weather-resistant Gore WindStopper shell and 35 ounces of light, lofty, 850-fill goose down.

- Backcountry.com

There are very few places that you'll ever need a bag warmer than the Western Mountaineering Puma with Gore WindStopper. Its 9 in. loft keeps you insulated to -25?F!