Upper Brown Trail Crazyhorse Oil-Tanned Leather. Construction Goodyear Storm Welt. Lining Comfort Drill Vamp. Insole Removable Full Length Polyurethane Footbed on Poron 4000 Comfort Cushion. Midsole: Rubber. Shank: Engineered Composite. Special Features: ASTM F2413-11 M/I/75/C/75, Steel Toe, EH Rated, Tested For and Meets CAN/CSA-Z195 18,000 Volts Electric Shock Resistance Standard.