Muck Boot Chore Classic Tall Steel Toe Men's Rubber Work Boot Synthetic Rubber sole 5 mm neoprene provides comfort and flexibility, along with excellent waterproofing, shock absorption and heat retention properties; adjusts to your foot shape to resist blisters and chafing 100% waterproof work boots; easy-to-clean high-grade rubber overlay with durable, quick-cleaning outsole; 16-inch height for added protection Breathable Airmesh lining wicks away humidity and perspiration, and allows air to travel throughout the boot; comfort rated from subfreezing to 65 F/18 C Steel shank for support; triple toe and quadruple rubber heel reinforcement for added protection and durability Steel toe protects against impacts from above; meets ASTM F2413-11 M I /75 C/75 EH