Western Mountaineering Bison StormShield

1932 – 2072 g

across 2 sizes

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

6'0" (185 cm)1932—

6'6" (200 cm)2072—

MaterialsStormShield waterproof-breathable shell, 850+ fill power goose downBrand countryUnited StatesProduct pagewesternmountaineering.com ↗NotesMummy (w/ full collar), rated -40° C (-40°F); 28 cm loft. Total weights from WM's specification chart; fill 1176 g / 1260 g.

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