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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
Max User Height (Long):
6 ft 6 in.
Shoulder Circumference (Long):
Hip Circumference (Long):
We only ship this brand to US Addresses.
Fill Weight (Long):
Hip Circumference (Regular):
Foot Circumference (Regular):
Shoulder Circumference (Regular):
Fill Weight (Regular):
Foot Circumference (Long):
Backpacking, Winter Camping, Basecamp and Expedition, Mountaineering and Alpine
Exact Temperature Rating:
-40 Degrees Fahrenheit
Sleeping Bag Shape:
Max User Height (Regular):
850+ Fill Down
-50 - -1 Degrees Fahrenheit
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 4 out of
Beautiful bag and backed by an awesome team of people at WMMy 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
Rated 5 out of
pretty awesome bagon 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 5 out of
COZY FIREPLACE-27℃ night @ camp2 ama dabalam nepal. feels like sleep in front of a cozy fireplace.hard to describe the detail, highly recommended.