✔ New in box The Muckmaster boot delivers comfort in all weather conditions. A stretch-fit top-line binding keeps the boot snug to your calves, sealing in warmth and keeping cold air out. Classic Muck Boot neoprene adapts to your foot’s contours, while a breathable mesh lining keeps feet comfortable. These commercial-grade boots are flexible, 100% waterproof, and supportive, with a thermal foam underlay and EVA molded midsole for warmth and comfort. Extended rubber overlays and durable outsoles provide protection and stability, keeping you dry and comfortable in any conditions. 100% Waterproof 5mm CR Flex-Foam neoprene liner is 100% waterproof with exceptional comfort, flexibility, shock absorption and heat retention; adjusts to your foot to resist blisters and chafing 2mm thermal foam under the footbed for extra warmth Breathable mesh lining wicks away humidity and perspiration Extended rubber overlay for extra protection Stretch-fit comfort topline binding snugs calf to keep warmth in and cold & debris out Lightweight EVA midsole for comfort MS1 bobbed molded outsole reduces weight and improves stability for climbing and trekking Reflective pull-tab for easy on and off Estimated height: 43cm/ 16.9" Estimated max calf circumference: 43cm/ 16.9" Comfort Range: -20°F to 50°F / -30°C to 10°C 5mm Neoprene Bootie for Comfort and Performance MS1 Bobbed Molded Outsole 2mm Thermal foam under the footbed Extended Rubber Coverage 100% Waterproof EVA Midsole for Added Comfort