Full grain SPR leather. Georgia waterproof system. Cement construction. Leather pull straps. Back zipper for easy on/off. Eel-stabilizing Counter Lock. High performance mesh lining. Quick response polyurethane foam removable insole. Fiberglass shank. Heat, chemical, abrasion, and slip-resisting dual-density EVA and Carbo-Tec rubber outsole. Ergo-Fit safety toe designed to match contours of feet, providing superior comfort and flexibility. ASTM F2413 protective toe classification. ASTM F2413 electrical hazard standard.