This is one tough winter boot for the wet cold blistering days. Waterproof full grain leather upper. Injection molded TPR shell. 400g PrimaLoft® Silver Insulation Eco recycled insulation. Northotic™ 2. 0 dual-density footbed with softer heel and forefoot-cushioning pads. Compression-molded EVA midsole. Durable TNF Winter Grip® outsole. IcePick® temperature-sensitive lugs for increased traction