Safety Features-Safety Rating: Meets ASTM F1677-96 MARK II Non-Slip Testing Standards Meets ASTM F2913-19 SATRA Non-Slip Testing Standards Meets ASTM F2412-18 and F2413-18 F I/75 C/75 EH standards Midsole meets ASTM D471-06 903# oil and isooctane chemical resistance standards Toe Type: Carbon-Fiber Toe Duty Type: Heavy Duty Water Proof Certified Slip Resistant (Mark II) Features: Left and right asymmetrical, non-metallic carbon-fiber toes offer unobtrusive fit and are 15% lighter than steel KEEN.DRY waterproof, breathable membrane Electrical hazard (EH) or Electric Shock Resistant (ESR) footwear provides a secondary source of protection incase accidentally coming into contact with live electrical circuits Nylon shank for midfoot support Full-grain Barnyard Resistant waterproof leather helps resist the damaging effects of oleic acid, urea, sodium chloride, and ammonium hydroxide Full Goodyear Welt Locking metal lace hooks Cleansport NXT Technology for natural odor protection* Material: Full Grain Waterproof Leather Upper Oil- and slip-resistant non-marking rubber outsole KEEN Luftcell: Air-infused, PU midsole for weightless comfort Moisture-wicking textile lining Removable, dual-density PolyAer PU footbed with aerated pillow-top cushioning Weight & Dimensions: Weight: 34.4 oz / 975.2 g Calf Circumference: 11.0 in / 27.9 cm Collar Height: 6.0 in / 15.2 cm