Toe & heel bumper Mark II slip resistant test results: Wet→1.00, Oily-0.55, Oily Wet-0.50 XRD Material metatarsal guard for impact protection 11 Inches in height Slip- and oil-resistant Full-grain leather and man-made combination Lenzi puncture-resistant plate ASTM F2413 puncture ...Toe & heel bumper Mark II slip resistant test results: Wet→1.00, Oily-0.55, Oily Wet-0.50 XRD Material metatarsal guard for impact protection 11 Inches in height Slip- and oil-resistant Full-grain leather and man-made combination Lenzi puncture-resistant plate ASTM F2413 puncture resistant standards Internal metatarsal guard ASTM F2413 protective toe classification Waterproof membrane Weight: 4.0 pounds per pair for a size 10 Flex-welt construction Non-metallic ASTM F2413 metatarsal guard standards ASTM F2413 electrical hazard standard Removable dual-density Rebound insole Nylon shank 90° defined heel