Western Mountaineering Bison GWS Expedition

2095 – 2180 g

across 2 sizes

Size / variantClaimed (g)Verified (g)Measurement note

6'0" (180 cm)2095—

6'6" (200 cm)2180—

MaterialsGore Windstopper shell, 850+ fill power goose downBrand countryUnited StatesProduct pagewesternmountaineering.com ↗NotesMummy (w/ full collar), rated -40° C (-40°F); 27 cm loft. Total weights from WM's specification chart; fill 1190 g / 1275 g.

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