Waterproof membrane seals out water and lets moisture escape; Waterproof full-grain leather upper, breathable mesh lining, and molded nylon arch shank; Metal hook with traditional lace closure, protective and abrasion-resistant toe cap; 100% recycled webbing and mesh footbed cover, 50% recycled removable EVA foam footbed; Cleansport NXT treated for natural smell control; Bellows tongue keeps out debris; Merrell Air Cushion in the heel absorbs shock and adds stability; Lightweight EVA foam midsole for stability and comfort; Slip and oil-resistant durable rubber outsole; Mark II tested; Steel Safety Toe for protection; rated ASTM F2413-18 I/C; Electrical Hazard (EH) Protection; meets ASTM Safety Standards