Stanley Men's Exploit Steel Toe Work Boot Boot opening measures approximately 14" around Meets ASTM standards F2413-11 and is rated I/75 and C/75, including electric hazard resistance Waterproof membrane with full grain leather & ripstop nylon fabric upper Goodyear welt construction with Dual density EVA midsole Slip & Oil Resistant rubber with anti-vibe outsole Removable EVA insole Reinforced TPU Heel Counter & ladder arch grips Insulated 200gr Thinsulate