Kamik Men's Icecrusher Boot,Khaki/Brown Sole,7 M US Rubber Rubber sole Shaft measures approximately 15" from arch Heel measures approximately 1.75" Platform measures approximately 0.5 inches Boot opening measures approximately 19" around Adjustable, waterproof nylon snow collar Removable 15mm Zylex 2F liner ICEGRIP outsole Temperature rated to -58F/-50C