Salomon Men's Toundra Pro Cswp-M Snow Boot 100% Waterproof Synthetic Imported Rubber sole Shaft measures approximately 8" from arch NASA technology for temperatures that are out of this world, Aerogels, makes the Toundra Salomon's warmest boot. Warm to -40 Degree Full CLIMASALOMON waterproof bootie guarantees that moisture will not penetrate the boot Trudge through Snow and ice with more confidence than Sno-Cat. The aggressive treads on this winter Contagrip sole offer outstanding traction on ice and snow