Challenge the competition. World Cup inspired design and a low volume fit give the X10 Skate ski boot a responsive feel and podium-worthy precision for expert and fitness oriented skiers. The skate specific design shares technology with an athlete proven X-ium series to deliver competition level control and feel. They are insulated for warmth and protect your feet from wind and moisture. Dual Core Technology allows targeted boot stiffness for the most responsive feel without a weight penalty. Carbon midsole insert provides increased stability and precision for optimized skating performance. Wintherm offers a breathable micro-perforated membrane that reflects heat back towards its source for incredible temperature regulation, comfort and warmth. Thermoadjustable liners can be heat-molded around your feet for a customized fit and comfort. Precise Boot Flex, Fit Optimized Skate Flex Breathable Warmth Customizable Fit, Comfort Central zipper + Velcro strap Materials Heel: Dual Core Heel Co