Known for its unique rustic grain, bison spend winters outdoors in harsh climates so their hide is naturally thicker than cows to provide them with more insulation.27' Back LengthHeavyweight but Soft Bison Leather100% Wool Plaid LiningBi-Swing BackSide Tabs at WaistDouble Entry Hand Warmer PocketsExternal Chest and Internal PocketsAdjustable Sleeve Cuffs100% nylon sleeve liningU.S.A.