This winter hunting boot features: Full-grain leather with 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. Full-cushion removable footbed. Rubber midsole. Lightweight nylon shank fights fatigue. Wolverine® Rubberlon Bob outsole.