Denali, Aconcagua, Himalaya… mountaineering in its extreme sense. These are places where mistakes cannot be made and so the Bison is most often chosen to serve. Gore Infinium™ fabric makes this bag impervious to the elements while remaining lightweight and very compressible. Crammed with 42 ounces of 850+ fill power down this bag has 10 abundant inches of heat trapping loft. Huge V-Block Side Baffles and horizontal baffles across your chest keep the down fill in place. Double Interlocking Draft Tubes and a down filled Gore Infinium™ collar seal in heat and security while howling winds surround your tent. The massive hood is not only well filled but is completely made with Gore Infinium™ fabric and has a large integral hood ruff to seal your face from the elements. The Bison is the crowning glory of Western Mountaineering and demonstrates our commitment to innovation and quality. This life saving bundle weighs in at a scant 4 lb. 10 oz.

Features

Explanation

Filled with 850+ Fill Power ethically-sourced premium goose down V-Block side baffles provides phenomenal down control and improves insulation in colder temperatures Weather-resistant Gore Infinium shell protects against extreme wind and moisture, while maximizing inner breathability Two Interlocking Draft Tubes seal the sleeping bag against cold wind and help retain inner temperature Offset Insulated Double Draft Tubes. Durable, abrasion-resistant footbox lining great for storing heavy boots & alpine equipment Gore-Lined insulated external hood ruff seals the bag out from freezing temperatures while retaining internal heat Comes with ultralight stuff sack and breathable mesh storage bag 4 lbs. 10 oz. Total Weight

Specifications

• US
• Metric

Shape	Mummy (w/ full collar)
Temp Rating	-40°F
Fill	850+ Power Goose Down
Color	Crimson/Black
Country of Origin	USA
Fabric	Gore Windstopper
Loft	10.5" in
Inside Girth shdr/hip/foot	6'0" 64"/55"/39" 6'6" 64"/55"/39"
Fill Weight	6'0" 42 oz 6'6" 45 oz
Total Weight	6'0" 4 lb 10 oz 6'6" 4 lb 13 oz
Stuff Size	6'0" 11"x22" XXL 6'6" 11"x22" XXL

Shape	Mummy (w/ full collar)
Temp Rating	-40°C
Fill	850+ Power Goose Down
Color	Crimson/Black
Country of Origin	USA
Fabric	Gore Windstopper
Loft	27 cm
Inside Girth shdr/hip/foot	180cm 163/140/99 cm 200cm 163/140/99 cm
Fill Weight	180cm 1190 g 200cm 1275 g
Total Weight	180cm 2095 g 200cm 2180 g
Stuff Size	180cm 28x55 cm XXL 200cm 28x55 cm XXL