CARBON-FIBER TOE: Left and right asymmetrical, non-metallic carbon-fiber (composite) toes offer an unobtrusive fit and are 15% lighter than steel; These men’s boots meet or exceed ASTM F3445 and F2413 M I/75, C/75 EH standards WATERPROOF: KEEN.DRY is a waterproof, breathable membrane liner that lets vapor out without letting water in for keeping your feet dry and comfortable; The Cincinnati 90-degree heel work boots have a mesh liner that integrates with the waterproof membrane TRACTION: Oil- and slip-resistant, non-marking, rubber outsoles meet or exceed ASTM F1677 MARK II non-slip, and ASTM SATRA TM31 material abrasion testing standards; Featuring a 90° heel (5/8") which helps "catch or lock" the foot in place CONSTRUCTION: Continuous Goodyear welt construction for enhanced durability under extreme working conditions; Full-grain barnyard resistant leather helps resist the damaging effects of oleic acid, urea, sodium chloride, and ammonium hydroxide SUPPORT & COMFORT: Featuring KEEN Luftcell, an air-infused midsole for weightless comfort and aerated pillow-top cushioning to keep your feet comfortable while walking on the job site