Baffin Women's Impact Insulated Boot 100% Nylon Imported Rubber sole Shaft measures approximately 12" from arch Heel measures approximately 1 1/2" Platform measures approximately 3/4" Boot opening measures approximately 15" around Waterproof Cold rating -148 F Integrated PU base 7-Layer removable inner boot system The bungee toggle snow collar adds the perfect finishing touch to this rugged cold weather boot.