Waterproof Nubuck leather upper. 200-gram Thinsulate⢠Insulation adds warmth. Permanent direct-attach molding seals out water. Breathable fabric lining. Removable full-cushion footbed. Tough, lightweight polyurethane midsole. Lightweight nylon shank fights fatigue. Steel toe rated ASTM F2413-11 M I/75 C/75 EH.