Upper: Dark Brown Tumbled Full Grain Leather with Black Suede Leather Inserts and Napa Leather Collar. Construction: Cement. Outsole: Durable Rubber Sole with 90° Heel. Lining: Two Zone Wicking Mesh. Insole: Full Length Removable Dual Density Polyurethane ''SHOCK ZONE'' Insert with Air Flow Vents. Midsole: Compression Molded Polyurethane. Shank: Fiberglass. Special Features: ASTM F 2413-05 F/I/75/C/75 Steel Toe. Electrical Hazard. Tested For and Meets CAN/CSA-Z195 18,000 Volts Electrical Shock Resistance Standard.