100% Waterproof 5mm CR Flex-Foam neoprene liner is 100% waterproof with exceptional comfort, flexibility, shock absorption and heat retention properties; adjusts to the contours of your foot to resist blisters and chafing Breathable mesh lining Stretch-fit topline binding snugs calf to keep warmth in and cold & snow out Extended rubber coverage for added protection Lightweight, cushioned EVA midsole for added comfort MS-1 molded outsole is rugged, aggressive and durable for maximum protection and stability Pull-tab for easy on and off Estimated height: 44cm/ 17.3" Estimated max calf circumference: 43cm/ 16.9" Comfort Range: -20°F to 50°F / -30°C to 10°C