Kodiak waterproof nubuck leather and Cordura® upper. Breathable GORE-TEX® waterproof membrane lining. 1000-gram Thinsulate™ Ultra Insulation adds warmth. Removable full-cushion insole, compression molded EVA foam midsole with camo wrap, and a lightweight nylon shank to help fight fatigue. A rubber lug outsole and cement construction finish off this waterproof boot.