Carhartt developed Rugged Flex work boots for hard working men and women who demand extreme levels of comfort, durability and safety. Storm Defender Waterproof Breathable Protection is designed to be completely waterproof and to keep your feet dry in most types of wet conditions with a waterproof and breathable membrane. FastDry Technology Lining wicks away sweat for comfort and the Carhartt PU with Foam cushion insole provides comfortable support and reduces foot fatigue. An EVA midsole with PU strobel pad provide extra layers of cushioned comfort. The Carhartt rubber Rugged Flex outsole is cement constructed. If you can't quit, YOUR BOOTS CAN'T EITHER.Oil-tanned leather; Lace closureStorm Defender waterproof breathable membrane keeps feet dry, but lets them breathe400g 3M Thinsulate Insulation keeps feet warmComposite toe protects against impact and compression hazards and meets ASTM 2413-17 standardsRubber toe and heel bumper for stability and protectionEVA midsole with polyurethane cushioned insole for support and shock absorbanceRugged Flex rubber outsole for durable traction and flexibilitySecondary protection against incidental contact with electrical circuits of 18,000 volts or less under dry