Amazon.ca Product Description Baffin's polar proven specialized boots are rated to perform at -100°c/-148°f. Tested at both the north and south poles, these boots perform flawlessly under the most demanding conditions. In our polar liners we doubled up on B-Tectum insulation and added a double aluminum insole and waffle-comb foot-bed to trap the warm air produced by your body and keep the cold out. This series is appropriate for extended periods of time in extreme cold weather, snow and/or ice covered environments, where activity level may be low to moderate. From the Manufacturer Twenty-Five years ago Baffin footwear began manufacturing insulated and non-insulated footwear products. While traditional molded boots are suitable for some conditions, they are not ideal for cold temperatures. Baffin combines leading molding technology with a foam-based inner boot system, which creates a hybrid style of high-performance footwear. This equates to more warmth, better fit, and superior comfort. Baffin boots are different than most shoes and work boots because the sole and midsole are molded to the base in one continuous process. The sole itself is a marvel of modern engineering because it is made up of several advanced thermo-set polymers that are combined together to achieve the right balance of warmth, protection, low weight and grip. Baffin is dedicated to offering boots with functionality and fashion, while still maintaining their legendary performance.