If you have a hankering to cross the ice cap, or just want a really warm, protective boot with great traction for snowmobiling, taking the early chair to operate a ski lift, or chop another load of frozen firewood, the Toundra Pro CSWP is a great choice. Aerothermaerogel technology makes them warm to -40°f / -40°c. Salomon's warmest boot. Warm to -40°. Full waterproof bootie. Winter Contagrip® for better traction on ice and snow Midsole heel height: 19 mm Drop: 11 mm Midsole toe height: 8 mm Weight: 450 g