Made in Canada with domestic and imported materials, the Men's Kamik Tundra winter boots will keep you warm all winter long. Constructed using a waterproof a lightweight synthetic RubberHe, these winter boots are cold rated up to -40°C, adjustable nylon collar with a bungee lace lock, 8mm Thermal Guard moiture-wicking removable liner, and an EXPLORER synthetic RubberHe outsole with deep treads for stability.