Muck Boot Arctic Sport High Performance Tall Steel Toe Insulated Men's Rubber Work Boot leather-and-synthetic Rubber sole Shaft measures approximately 14.25" from arch Heel measures approximately 2" Platform measures approximately 1" Boot opening measures approximately 15.75" around 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 2 mm thermal foam under the footbed and warm fleece lining provide excellent warmth in cold temperatures; comfort rated from -40 F/-40 C to 40 F/4 C Stretch-fit Comfort Topline snugs calf to seal in warmth while keeping cold and debris out; EVA contoured and molded midsole fits natural foot shape for added support MS-1 molded outsole provides sure grip in wet, icy and snowy conditions; 17-inch height for added protection 100% waterproof work boots; steel toe protects against impacts from above; meets ASTM F2413-11 M I/75 C/75 EH