Baffin Icefield Boots are part of the Arctic collection, Polar Proven to perform down to -148AdegF. They provide waterproof protection from snow and slush. Plus, the rubber shell and outsole are formulated to perform in extreme conditions. And their multi-layer Inner Boot System doubles up on insulation and adds a reflective double-aluminum insole, making these Boots perfect for warmth during extreme cold and low-to-moderate activity. Inside the Inner Boot System This max-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 max-layer Inner Boot System keeps you warm, constantly pulls away moisture Double the B-Tek insulation, double aluminum insole for added warmth, reflective heat properties EVA midsole Waterproof nylon snow collar Shockcord-adjustable webbed lacing Snowshoe compatible Temperature rating of -148Adeg-F Part of the Arctic collection for comfort in the most demanding conditionsPlease Note: Running small, consider ordering a size up for best fit. Order today!