100% Waterproof; 5MM CR Flex Foam Neoprene Waterproof Liner With Flexibility, Shock Absorption And Heat Retention Properties And Adjusts To Contours Of Your Foot To Resist Blisters And Chafing; Breathable Mesh Lining Wicks Away Humidity And Perspiration Allowing Air To Travel Throughout Boot; BioDEWIX Antimicrobial Footbed Insert Topcover With NZYM For Odor Control And Moisture Management; Reinforced Arch Support; Steel Shank For Structural Support; Triple Rubber Toe Reinforcement; Quadruple Heel Reinforcement; Easy To Clean Rubber Overlays; Quick Cleaning Rubber Outsole; Comfort Range: Sub Freezing To 65 Degrees F; Half Sizes Order Up; Meets ASTM F2413-18 M/I/C EH/ESR (Electrical Shock Resistant) Rated Outsole; Style #WCHM000