100% Waterproof; 5mm CR Flex-Foam neoprene liner is 100% waterproof with exceptional comfort, flexibility, shock absorption and heat retention properties; Breathable mesh lining; Stretch-fit topline binding snugs calf to keep warmth in and cold and 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"; Comfort Range: -20F to 50F / -30C to 10C