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 wicks away humidity and perspiration, allowing air to travel throughout the boot Easy to clean rubber overlays Triple rubber toe reinforcement Quadruple rubber heel reinforcement bioDEWIX™ antimicrobial footbed insert topcover with NZYM™ for odor control and moisture management Reinforced arch support Steel shank for structural support Quick cleaning rubber outsole offers durability and traction on slick surfaces Meets ASTM F2413-18 M/I/C EH / ESR (electric shock resistant) rated outsoles Pull-tab for easy on and off Estimated boot height 40.5cm/ 15.9in Estimated max calf circumference 42cm/ 16.5in Comfort Range: Sub Freezing to 65°F / 18°C Weight: 4.61 lbs size 7 Half sizes order up