Tested at both the North and South Poles, Impact performs flawlessly under the most demanding conditions. Impact 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. Features Insulation Level: Removable Comfort-Fit multi-layer inner boot system Waterproof Level: B-Tek Dry Waterproof Breathable For the coldest moments on Earth. Polar Rated cold-comfort is achieved with moderate activity and has been Polar Proven by us on expeditions to both the North and South Poles. A powerful waterproof technology, offering high wet protection with increased breathability. This category of waterproofing protects from the elements, while providing lightweight comfort for active lifestyles. Technology Upper Double buckle fastening for added security Nylon locking snow collar to protect from the elements Base Snowshoe compatible Arctic Rubber shell to provide lightweight flexibility, cold-resistance and resilience EVA midsole for light-weight insulation and cushioning Polar Rubber outsole for maximized grip and longevity of boot at cold temperatures Insulation Removable Comfort-Fit multi-layer inner boot system featuring: Thermaplush soft, next-to-foot wicking layer for warmth Form fitting B-Tek Foam lining for comfort Double B-Tek Heat lightweight, 4-channel hollow-fibre insulation for high-loft breathability in a broad range of temperatures Vaporized Aluminum Membrane for energy reflection and heat regulation PolyWool polyester wool blend for breathable warmth Hydromax layering for improved moisture management Diamond Net insulation for wind-resistant protection with a lightweight feel Double aluminum insole to retain body heat Waffle-comb footbed designed to trap warm air and control odour Double aluminum insole returns heat and reflects cold for temperature regulation Specifications: Height: 15" External Forefoot Width: 5.25" External Length: 13.25" Weight of Pair: 7.42 lbs - Based on Men's Size 9 Baffin Men's Impact Boot