Muck Boot Chore Oil, Chemical & Slip Resistant Steel Toe Men's Rubber Work Boot Rubber Rubber sole Shaft measures approximately 10" from arch Heel measures approximately 1.75" Platform measures approximately 1.5 inches Boot opening measures approximately 14.25" around Chore V-Wave outsole with SR Slip-resistance Compound offers improved traction on slippery surfaces, including steel and ceramic tile 100% waterproof work boots; Honeywell proprietary RDR compound is resistant to most oil-based fluids and other chemicals 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 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 Rear pull loops for easy on/off; steel shank for support; triple toe and quadruple rubber heel reinforcement; steel toe protects against impacts from above; ASTM F2413-11 M I/75 C/75