Full-grain leather and tough 1000-denier Cordura® nylon upper. Classic Goodyear welt construction is sturdy and flexible. Breathable GORE-TEX® waterproof membrane lining. 600-gram Thinsulate™ Ultra Insulation adds warmth. Removable full-cushion footbed. Rubber midsole. Lightweight nylon shank fights fatigue. Wolverine Rubberlon Bob outsole. Optional safety toe rated ASTM F2413-11 M I/75 C/75.