Baffin Men's Muskox Insulated All-weather Boot 100% Synthetic Imported Synthetic sole Shaft measures approximately 11" from arch Platform measures approximately 1 inches Boot opening measures approximately 11" around Insulated boot featuring D-ring lacing with locking snow cuff and reflective piping at back of shaft Removable multi-layer foam-based inner boot -40 celsius/-40 fahrenheit temperature rating Cold-tested high-traction rubber outsole with reinforced arch