Kamik Men's Champlain Boot 100% Synthetic Imported Minus 148F Temperature rated Rubber sole Shaft measures approximately 6" from arch Heel measures approximately 1" Boot opening measures approximately 15" around Rugged ankle boot featuring seam-sealed waterproof suede upper with padded collar and zip-up vamp Waterproof gusset tongue Fixed Foam and 200B 3M Thinsulate insulation Moisture-wicking lining