Gear
Bison GWS Expedition -40°F
Premium -40°F expedition sleeping bag for polar travel and high-altitude mountaineering.
Specification researchedEditorial draft · not indexed
Topic summary
Premium -40°F expedition sleeping bag for polar travel and high-altitude mountaineering.
Key takeaways
- -40°F rating
- approximately 4 lb 10 oz
Intended uses
Premium -40°F expedition sleeping bag for polar travel and high-altitude mountaineering.
Verification notes
Evidence: specification researched. Specifications verified from manufacturer data. Last verified July 15, 2026. Editorial draft — currently excluded from search indexing.
Editorial take
Premium -40°F expedition sleeping bag for polar travel and high-altitude mountaineering.
Best for
- Premium -40°F expedition sleeping bag for polar travel and high-altitude mountaineering.
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Verified specifications
- Materials
- 850+ fill-power down, Gore Infinium shell
- Country of manufacture
- 🏳️ Unknown
- Key features
- -40°F rating
- approximately 4 lb 10 oz
Warranty and repair information: contact Western Mountaineering directly for the most current terms.
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Data sources & verification
- Source: Curated Alone expansion
- Last verified: 7/15/2026