Waterproof insulated mid-calf boot designed for extreme weather. 2.0-2.2mm waterproof full grain leather. Hyvent waterproof/breathable barrier. 400 grams Primaloft insulation. Dry-flex fleece collar and tounge lining. Outlast footbed absorbs excess heat and releases stored jeat as needed. Injection moulded waterproof TPU shell with forefoot flex grooves. Injection moulded nylon shank insert with dual density X-2 footbed. EVA midsole. TNF Wintergrip rubber outsole.