The men’s TOUNDRA PRO CS WP insulated boots are rugged enough to handle up to -40 conditions and keep you warm and dry. The outsole is an ice-gripping rubber compound featuring Winter Contagrip traction and fierce lugs. A full waterproof bootie construction features a Climashield Waterproof membrane to keep you dry. Inside, NASA-influenced Aerogels Insulation and synthetic fur keep you warm. The midsole is a moulded EVA comfort machine, while the sockliner is die-cut EVA. An external heel counter makes for a secure fit. When technology like this combines for an ultralight boot, winter is left defenseless.