Product Details + Built with an outsole design and materials that help provide slip-resistance and traction on various surfaces. Waterproof membrane Square toe Tempered steel shank ASTM F2413 protective toe classification ASTM F2413 electrical hazard standard Double row welt stitch Distressed full-grain leather with synthetic shaft 11 Inches in height Shaft height and circumference may vary by size 15-inch calf circumference 16-inch calf circumference Lightweight and flexible molded EVA midsole Slip and oil resistant, dual density and abrasion resistant rubber outsole