Bison GWS Expedition

$1,400.00

Spec sheet Checked by IndieOut

Maker: Western Mountaineering
Made in: San Jose, CA
Type: Gore Windstopper Series
Availability: In stock at maker
Added: Apr 10, 2026
Last verified: Apr 10, 2026
Fulfilled by: Western Mountaineering — direct

Made in San Jose, CA by Gary Schaezlein. Handmade down sleeping bags from San Jose since 1970.

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Meet the maker

Western Mountaineering

San Jose, CA · Sleeping Bags & Down

Handmade down sleeping bags from San Jose since 1970. Gary Schaezlein has been filling bags by hand for over 50 years. The gold standard in expedition sleeping bags.

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Details

Bison GWS – Gore Infinium™ Extreme Expedition Sleeping Bag Denali to Aconcagua to the Himalaya, the Bison GWS is built for the most extreme mountaineering conditions on Earth—places where failure is not an option. Trusted by professional climbers and polar explorers, this bag delivers life-saving warmth and protection in the coldest, harshest environments imaginable. With 42 oz. of premium 850+ fill power ethically sourced goose down , the Bison GWS achieves an incredible 10 inches of loft and a -40°F (-40°C) temperature rating . The Gore Infinium™ shell provides outstanding water resistanc...