This Gore Tex Wolverine Boot has Full-grain leather upper with tough 1000-denier Cordura« nylon 600-gram Thinsulate Insulation adds warmth Breathable GORE-TEX« waterproof membrane lining This Insulated Wolverine Boot also has Removable full-cushion insole Tough, lightweight polyurethane midsole Rubber lug outsole Permanent direct-attach molding seals out water Lightweight nylon shank fights fatigue Steel toe rated ASTM F2413-05 M I/75 C/75 EH