Full grain SPR Leather foot. Goodyear Welt Construction. Oil and slip resisting long range outsole system with ten peak performance components. 1 Year Vapor Pass Breathable Waterproofing. Long range dual-density footbed. Expansion fit seam. Nylon shank. Genuine double row welt stitch through outsole. Composite square toe. ASTM F2413 Electrical Hazard. ASTM F2413 Protective Toe.