For true outdoorsmen, bitter cold isn’t a hindrance, it’s an opportunity. A chance to prove that toughness and the right gear can outlast Mother Nature’s worst. Our Monolithic Extreme Boots were built for such a challenge. Waterproof leather, 900-denier nylon, a waterproof, breathable membrane and 2,400 gram Thinsulate Ultra Insulation keep you comfortably warm and well protected from cold. Plus, a multi-directional rubber lug outsole with aggressive tread provides the durability and traction you want, while a combination of thick EVA midsole and polyurethane foam insole deliver the comfort inside. So you can outlast the cold-and feel good doing it. Rugged full-grain leather and 900-denier nylon uppers; Lightweight, non-bulky, breathable 2,400-gram Thinsulate Ultra Insulation; 8mm wool frost barrier between the midsole and outsole puts a thick barrier between your feet and the ground; Guide Dry waterproof/breathable membrane keeps water out while allowing vapor to escape; EVA midsole and polyurethane insole with wool fleece sockliner provide responsive comfort; Slip- and oil-resistant multi-directional lug outsole delivers outstanding traction; Molded PVC toe and heel counter add to the durability and longevity of this pair; Durable side rand adds an extra measure of protection for the Boot; Steel shank provides firm underfoot support; Moisture-wicking mesh lining pulls moisture from your feet for cool, dry comfort; Wool fleece sockliner for added warmth and comfort; Padded tongue and collar; Rear pull-on loop; Waterproof: Guide Dry; Insulation: 2,400-gram Thinsulate Ultra; Upper: Full-grain leather and 900D nylon; Insole: PU with heat-reflecting silver layer; Midsole: EVA; Outsole: Slip- and oil-resistant rubber lug; Lining: Moisture-wicking mesh; Special features: 8mm wool frost barrier, heat-reflecting silver sheet; Height (approx.): 11″; Weight per boot (approx.): 42.4 oz.