Men's Carhartt Millbrook 6" Nano Toe Waterproof Work Boots Nano Composite safety toe caps are lightweight, non-metallic/metal detector friendly and non-conductive to heat or cold. Nano Composite toe styles meet or exceed ASTM 2413-18 standards. Storm Defender™ Waterproof breathable membrane allows moisture to escape while keeping your feet dry. Insite® footbeds provide high rebound cushion with podiatrist designed arch support. Carhartt LWD midsole provides elevated lightweight comfort with the expected Carhartt durability. Durable slip-resistant rubber outsole for traction and flexibility with every step. FastDry™ Technology Lining wicks away sweat for comfort. Electrical Hazard footwear provides protection against live electrical currents and meets ASTM F2413-18 EH standards.