Gear
Western Mountaineering Bison GWS
Severe cold with wind, spindrift and condensation risk
Western Mountaineering
Editorial take
Western Mountaineering Bison GWS is a cold-weather sleeping bag with an advertised -40°F rating and 850+ fill-power down; GORE WINDSTOPPER shell; expedition draft control. It is best suited to severe cold with wind, spindrift and condensation risk.