Full Grain Oil-Tanned Leather. Construction: Goodyear Storm Welt. Lining: Forest Green Dri-Lex. Insole: Removable Polyurethane Footbed on Top of a Poron 4000 Comfort Cushion. Midsole: Rubber Green Stripe. Shank: Engineered Composite. Outsole: Dual-Density Polyurethane Comfort Sole with 90 degree Heel. Special Features: ASTM F2413-11 M I/75/C/75/Mt/75 Steel Toe, EH Rated. Tested for and meets CAN/CSA-Z195 18,000 Volts Electrical Shock Resistance Standard. Patented I-MET Technology.