Salomon S/Pro 110 - ski boots product details Men's ski boots Target group: advanced to good drivers Flex: 110 Individually adjustable flex outer shoe: Polyurethane/Fiberglass Coreframe Coreframe 360° ensures low weight and increased driving experience Thermoformable Custom Shell HD shell and cuff Sense Amplifier technology for progressive and precise turn initiation Riveted oversized pivot system enables perfect power transmission between shaft and shell 4 aluminum 3D buckles for optimal step-in comfort and personalized foothold Strap: 45mm Velcro Alpine soleplates pre-installed, GripWalk soleplates sold separately Liner: Model: CustomFit 3D Seamless Pro Seamless, preformed and heat-friendly inner shoe Anatomically shaped footbed Pull tab on tongue and collar Soft interior.