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; Fleece lining for additional warmth; bioDEWIX antimicrobial footbed insert topcover with NZYM for odor control and moisture management; Extended rubber coverage for added protection; Quadruple heel, triple toe and double instep rubber add protection and durability; Stretch-fit comfort topline binding snugs calf to keep warmth in and cold & debris out; Wide-tracking waffle outsole for superior traction on treestand grates, rocks and slick surfaces; Comfort Range: -20F to 50F / -30C to 10C