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 Steel shank for structural support Stretch-fit topline binding snugs calf to keep warmth in and cold out Quick cleaning rubber outsole offers durability and traction on slick surfaces Meets ASTM F2892-18 EH / ESR (electric shock resistant) rated outsoles Reflective pull-tab for easy on and off Estimated boot height 40.5cm/ 15.9 in. Estimated calf circumference 42 cm / 16.5 in. Estimated footbed width 9.1 cm / 3.6 in. Estimated heel height 2.9 cm / 1.1 in. Estimated weight: 4.21 lbs size 9 Comfort Range: Sub Freezing to 65°F / 18°C