Baffin Tundra Mens -40 C (-40F) Winter BootsTUNDRA is a function first boot, suitable for everyday winter wear. With multi use capabilities, TUNDRA is recommended for use during moderate to high levels of activity and features a combination of Baffin's proprietary technologies. Whether you're shoveling snow or mountain scaling in Squamish, this boot is guaranteed to react. Upper: Tall height, nylon upper with locking snow collar to protect from the elements Reflective piping for visibility