ConstructionSorel CARIBOU™ WP shoes were designed for cold, snowy days.Internal insulation comes in the form of a removable felt boot from9 mm thick recycling. Upperit is made of suede and waterproof ballistic nylon, enriched withsealed seams. The laces are not waterproof. The sole was divided intomiddle, made of 2.5 mm felt and outer Sorel aero-track,vulcanized rubber with a lightweight structure. Sorel Caribou 1002871281 trekking winter men