Rated to -43°C/-45°F. Active, warm, winter boot. Provides maximum protection and ultimate styling in the coldest of weather. Fully seam sealed waterproof Nubuk and suede leather. Rust proof hardware. 400 grams of Thinsulate Ultra insulation. Removable EVA footbed. Thermashield frost plug. Die-cut EVA midsole and non-marking Omni-Grip rubber outsole. Snowshoe compatible.