Upper: Tobacco Oil-Tanned Leather Construction: Goodyear Storm Welt Lining: Cotton Drill Vamp Insole: Removable Dual Density Ultimate Shock Absorption? Footbed on Poron 4000 Comfort Cushion Midsole: Rubber Shank: Engineered Composite Outsole: Single-density polyurethane MAXwear Wedge? Special Features: ASTM F2892-11 Standard Specification for Performance Requirements for Soft Toe Protective Footwear (Non-Safety / Non-Protective Toe), EH rated