Waterproof nubuck leather upper. Removable full-cushion insole. Tough and Lightweight Polyurethane midsole. Lightweight nylon shank to fight fatigue. Permanent direct-attach construction seals out water. Wolverine Mulish™ Vibram® rubber lug outsole. Steel-toe rated ASTM F2413-05 M I/75 C/75 EH.