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Western Mountaineering Bison Gore Windstopper Sleeping Bag

Western Mountaineering Bison Gore Windstopper Sleeping Bag is rated 4.7 out of 5 by 3.
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4.6 Star Rating
4.6
$1,095.00

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Product Details Specifications Ratings & Reviews Q & A Size Guide
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Product Description Item No.   10044148

The Western Mountaineering Bison Gore Windstopper Sleeping Bag is a -40°F sleeping bag for mountaineering expeditions to the peaks you've always dreamed of. As the wind howls through the night and the snow is doing its thing up on the mountain, you can zip yourself inside this Bison for warm. Packed with 42oz of 850+ fill power goose down to create a 10" loft so you'll be sleeping soundly, dreaming of standing on the peak by sunrise. The GORE® WINDSTOPPER™ shell fabric provides the weather resistance you'll need in extreme weather and temperatures. Who would've thought all this warmth can weigh in at just 4lbs, 10oz? Made right in the good old US of A to make all of your cold weather dreams possible.

FEATURES of the Western Mountaineering Bison Gore Windstopper Sleeping Bag

  • 5 1/4" Spacing/V-Block Side Baffle
  • 64/39" Shoulder/Foot Girth
  • Full Down Collar
  • Insulated External Hood Ruff
  • Offset Insulated Double Draft Tubes
  • 10" Loft, -40 F
  • 42 oz Down Fill
  • 4 lbs 10 oz Total Weight

- + Product Specifications
Gender: Mens
Features: Draft Collar
Best Use: Backpacking, Winter Camping, Mountaineering and Alpine, Basecamp and Expedition
Weight: 74 oz
Exact Temperature Rating: -40 Degrees Fahrenheit
Sleeping Bag Shape: Mummy
Fill Details: 850+ Fill Down
Zipper Side: Right
Fill Weight (Regular): 42 oz
Fill Weight (Long): 45 oz
Max User Height (Regular): 6 Feet
Max User Height (Long): 6 ft 6 in.
Foot Circumference (Regular): 39 in.
Foot Circumference (Long): 39 in.
Shoulder Circumference (Regular): 64 in.
Hip Circumference (Regular): 55 in.
Shoulder Circumference (Long): 64 in.
Hip Circumference (Long): 55 in.
Product Technology: GORE Windstopper
Disclaimer: We only ship this brand to US Addresses.
Insulation: Down
Temperature Rating: -50 - -1 Degrees Fahrenheit
GORE WINDSTOPPER

GORE WINDSTOPPER
WINDSTOPPER fabrics utilize an ultra-light, ultra-thin membrane to block wind while allowing interior moisture vapor to escape. This will keep your body and your inner layers dry and comfortable.

Rated 5 out of 5 by from COZY FIREPLACE -27℃ night @ camp2 ama dabalam nepal. feels like sleep in front of a cozy fireplace.hard to describe the detail, highly recommended.
Date published: 2014-12-03
Rated 5 out of 5 by from pretty awesome bag on an ill fated (we had to hike out to closest road after getting dumped on by 20" snow over night) Pemi traverse last winter this bag was awesome. I am 6'6" 185lb and always cold in bags in the winter. This is the first bag that I was legitimately warm in the middle of a northern NH winter.
Date published: 2011-11-05
Rated 4 out of 5 by from Beautiful bag and backed by an awesome team of people at WM My relationship with this bag can be best summarized as love at first sight. Unfortunately, the first time I used the bag I noticed that the stitching (though beautiful and perfect everywhere else on the bag) was loose in about a 1 cm section at the base of the collar, and it was slowly leaking down. I called WM and they were super nice and helpful. They told to mail in the bag on their dime (using their UPS account), and they would fix it and rush it back to me in time for a trip a month from now. I have never felt so good after dealing with a customer service department. I still have 100% confidence in the bag, and now I also have 100% confidence in the company and their warranty.
Date published: 2010-11-09
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I'm a woman who's 5'2. With all honesty, would this be a good fit?

Asked by: nellyattar
Hey there, Nelly! Great question! From your questions about our other sleeping bags, we see you're heading to Mt. Everest next year. I spoke with one of our gear guys who is also a mountain climber to get you an expert answer. He wanted to let you know that this bag would be ideal for that kind of expedition. He said that length isn't as big of an issue as degree of warmth of the sleeping bag. He also said you're going to have a hard time finding a shorter bag than this one. In fact, if it's a little long for you, once you're zipped inside, you've got more warm air trapped in there with you, and you'll have some extra room to add layers of clothing if you need to. The only other sleeping bag he would recommend for your needs is this one by Mountain Hardwear: https://bit.ly/2MRQyLM I hope this helps!
Answered by: Buttercup
Date published: 2018-07-05
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- + Size Guide

Sleeping Bags Size Comparison Charts

EXtremeLite Series Bags
Model Shape Size Shoulder Girth Hip Girth Foot Girth
MityLite Semi Rectangular 6' 3" 62" 59" 46"
HighLite Mummy Box Stitched 5' 6" 59" 51" 38"
6' 0" 59" 51" 38"
6' 6" 60" 52" 38"
SummerLite Mummy 5' 6" 59" 51" 38"
6' 0" 59" 51" 38"
6' 6" 60" 52" 38"
Tamarak Semi Rectangular 5' 0" n/a 58" 33"
MegaLite Mummy with Top Collar 5' 6" 63" 56" 39"
6' 0" 64" 55" 39"
6' 6" 65" 56" 39"
UltraLite Mummy with Full Collar 5' 6" 59" 51" 38"
6' 0" 59" 51" 38"
6' 6" 60" 52" 38"
AlpinLite Mummy with Full Collar 5' 6" 63" 56" 39"
6' 0" 64" 55" 39"
6' 6" 65" 56" 39"
VersaLite Mummy with Full Collar 5' 6" 62" 53" 39"
6' 0" 62" 53" 39"
6' 6" 63" 54" 39"
Microfiber Series Bags
Model Shape Size Shoulder Girth Hip Girth Foot Girth
Caribou MF Mummy Box Stitched 5' 6" 63" 56" 39"
6' 0" 64" 55" 39"
6' 6" 65" 56" 39"
Alder MF Semi Rectangular 6' 0" 62" 59" 46"
6' 6" 62" 59" 46"
Sycamore MF Semi Rectangular 6' 0" 62" 59" 46"
6' 6" 62" 59" 46"
Ponderosa MF Semi Rectangular 6' 0" 67" 64" 48"
6' 6" 67" 64" 48"
7' 0" 67" 64" 48"
Apache MF Mummy with Full Collar 5' 6" 59" 51" 38"
6' 0" 59" 51" 38"
6' 6" 60" 51" 38"
Badger MF Mummy with Full Collar 6' 0" 66" 57" 41"
6' 6" 67" 58" 41"
7' 0" 67" 58" 41"
Antelope MF Mummy with Full Collar 5' 6" 62" 53" 39"
6' 0" 62" 53" 39"
6' 6" 63" 54" 39"
Sequoia MF Semi Rectangular with Full Collar 6' 0" 66" 61" 48"
6' 6" 66" 61" 48"
Kodiak MF Mummy with Full Collar 6' 0" 66" 57" 41"
6' 6" 67" 58" 41"
7' 0" 67" 58" 41"
Bristlecone MF Semi Rectangular with Full Collar 6' 0" 69" 61" 48"
6' 6" 69" 61" 48"
Lynx MF Mummy with Full Collar 5' 6" 61" 54" 39"
6' 0" 62" 54" 39"
6' 6" 63" 55" 39"
Puma MF Mummy with Full Collar 5' 6" 62" 55" 39"
6' 0" 64" 56" 39"
6' 6" 66" 57" 39"
Gore Windstopper Series Bags
Model Shape Size Shoulder Girth Hip Girth Foot Girth
Apache GWS Mummy with Full Collar 5' 6" 59" 51" 38"
6' 0" 59" 51" 38"
6' 6" 60" 52" 38"
Badger GWS Mummy with Full Collar 6' 0" 66" 57" 41"
6' 6" 67" 58" 41"
7' 0" 67" 58" 41"
Antelope GWS Mummy with Full Collar 5' 6" 62" 53" 39"
6' 0" 62" 53" 39"
6' 6" 63" 54" 39"
Sequoia GWS Semi Rectangular with Full Collar 6' 0" 66" 61" 48"
6' 6" 66" 61" 48"
Kodiak GWS Mummy with Full Collar 6' 0" 66" 57" 41"
6' 6" 67" 58" 41"
7' 0" 67" 58" 41"
Lynx GWS Mummy with Full Collar 5' 6" 61" 54" 39"
6' 0" 62" 54" 39"
6' 6" 63" 55" 39"
Puma GWS Mummy with Full Collar 5' 6" 62" 55" 39"
6' 0" 64" 56" 39"
6' 6" 66" 57" 39"
Bison GWS Mummy with Full Collar 6' 0" 64" 55" 39"
6' 6" 64" 55" 39"