Whatever winter has in store, be prepared. Often imitated, never equaled, the Sorel Caribou Men's Boot features nubuck leather upper with waterproof construction, seam-sealing and a removable ThermoPlus felt inner boot for warmth, comfort and protection in cold and wet winter weather. - Seam-sealed waterproof construction - Waterproof nubuck leather upper - Removable 9mm ThermoPlus felt InnerBoot - Sherpa Pile snow cuff - 25mm bonded felt frost plug - Handcrafted waterproof vulcanized rubber shell - SOREL AeroTrac non-loading outsole