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; 3D Airmesh linings for breathability; Stretch-fit topline binding snugs calf to keep warmth in and cold & snow out; Full rubber coverage to top of the boot - Certified Against Snake Strike; 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; bioDEWIX Dry antimicrobial footbed insert topcover