SOFT TOE: KEEN.PROTECT soft toe caps help safeguard against minor impact, but are not reinforced with a secondary crush resistance material; The Flatland waterproof work boots for men meet or exceed ASTM F2892 EH standards WATERPROOF: KEEN.DRY is a waterproof, breathable membrane liner, keeping your feet dry and comfortable; Full-grain barnyard resistant waterproof leather helps resist the damaging effects of oleic acid, urea, sodium chloride, and ammonium hydroxide COMFORT: Made with KEEN.ReGEN a lightweight, compression-resisting midsole providing 50% more energy return than standard EVA foam; KEEN.LOCKFIT firm U-shaped support provides extra heel stability; An external stability shank is used for midfoot support TRACTION: Oil- and slip-resistant, non-marking, rubber outsoles that meet or exceed ASTM F1677 MARK II non-slip, and ASTM SATRA TM31 material abrasion testing standards; Featuring a 90° heel (5/8" Height) provide grip for increased traction MATERIALS: Featuring leather uppers that meet ASTM D471 #903 standards for oil and isooctane chemical resistance, and have 100% non-metallic construction for passing through metal detectors; Heat-resistant rubber outsole rated up to 572°F/300°C