Go ahead and get extreme. BaffinA(R) Impact Polar Boots can handle extreme temps down to a bone-chilling -148AdegF. Baffin took their multi-layer inner boot system, doubled up on insulation and added a reflective double-aluminum insole, making these Boots perfect for extreme cold and low to moderate activity. Plus, they provide waterproof protection from snow and slush. And, double-buckle fasteners mean you don't have to mess with laces. Inside the Inner Boot System Their multi-layer system is designed to keep you warm while wicking away moisture. B-Tek Heat hollow-fiber insulation holds heat, while Thermaplush wicks away sweat. Hydromax II holds moisture while vaporized aluminum membrane funnels it out of the boota |it also reflects body heat for added warmth. Even wafflecomb layers hold heat to keep warmth inside. And within all this are layers of form-fitting foam and polyester/wool for a comfortable step. Waterproof Diamond-lite insulated nylon uppers Waterproof Arctic rubber shella |TPR blend is durable but lightweight and flexible, even in sub-zero temps Polar rubber outsole is wear-resistant but lightweight and flexible, and great for gripping snow and ice Removable multi-layer comfort insole keeps you warm, constantly pulls away moisture Double the B-Tek insulation, double aluminum insole for added warmth, reflective heat properties EVA midsole Double-buckle fastening Snowshoe compatible Temperature rating of -148Adeg-F Part of the Polar collection for comfort in the most demanding conditions Each approx. 16"h., 43 oz. Order today!