When the mission is forged through the coldest winter conditions, this boot is fully prepared. Completely waterproof, insulated for warmth to -40Adeg, and armed with fierce lugs for traction in snow and ice, TOUNDRA FORCES CSWP is advanced technology for arctic assaults. Salomon has teamed up with nano-technology leaders, Aspen AeroGels, in a partnership that has produced yet another worldwide exclusive. By weaving the lightest manmade material on earth into a fabric known as SpaceLoft(TM) (initially developed for NASA spacesuits) our R&D team has achieved massive savings on weight and space in footwear. And by strategically placing the material where it is needed most we have produced a boot that not only features less bulk and superior fit but also keeps your feet in the comfort zone 50% longer than our competitors' coldest rated boots. Extreme Warmth Featuring Aerogel insulation, TOUNDRA is rated to keep feet warm in -40Adeg Traction The winter ContagripA(R) sole features deep, aggressive lugs to ensure footing through snow, ice, mud, etc. Lightweight Best-in-class weight and flexibility make this boot ideal for serious action.