The Nordica Strider 130 is a great option for aggressive, expert level skiers with a medium width forefoot and standard calf volume. The Strider remains lightweight but powerful thanks to the Tri Force Shell Construction which optimizes lightweight materials and plastics. Customizable cork liners make it into the mix for the perfect fit and comfort while generously insulated with Primaloft for extra warmth on those cold mountain days. Weather Shield protects feet from any wanted moisture like water or snow for dry feet to focus on the fun. Unhinging the shell from the cuff allows for 46 degrees range of motion when you want to ascend into the mountains for a backcountry journey. Take your Striders into a qualified ski shop and put Infrared Technology to the test to get the shell heat formed for any adjustments to make the boot exactly how you want it to fit. Stride into nature with the Nordica Strider 130. Best Fits a Medium Forefoot and Standard Calf Volume. Infrared Technology- Provides full shell and cuff customization for a custom fit. Custom Cork Fit Liner- Enhances comfort and provides shock absorption and control. Primaloft Insulation- Keeps feet warm and cozy. Tri Force Shell Construction- uses three different plastics in the construction process for the perfect balance of performance and weight savings. Weather Shield- Waterproof textile that prevents. Feather Lock Hike/Ski Mechanism- Offers 46 degrees range of motion for uphill hikes. Michelin Grip Walk Soles. This Boot is Only Compatible with Bindings Stamped GripWalk (GW) or Multi Norm Certified (MNC) .