The current U.S. Issue Vapor Barrier Boot is very labor intensive to produce and can currently only be made by a single factory in Canada. It so happens that the firm that can produce the VB boot, AirBoss Defense, also makes the Candian Forces Extreme Cold Weather Mukluk. This Mukluk protects the feet to the same temperature as the VB Boot (0 to -55 Deg C) is lighter weight, features a removable liner and insoles and is also taller.
