Designed to make it easier to adjust your foothold and performance throughout the day, Salomon's Supra BOA 110 challenges traditional boot constructions to give you a new standard of perfect fit. Featuring the BOA Fit System, it offers more consistent foot-wrapping for more comfort and control on the slopes. Flex Rating: 110 Mid-Stiff Last Width: 100 mm (expands to 106 mm when molded) Shell/Cuff Material: Heat-moldable Polyurethane High-Density ExoWrap Liner Type: My CustomFit 4D Sport Closure: Single BOA Dial, Energyzer Velcro Strap Footbed: Light2 Shaped Foam Sole Type: GripWalk ISO 23223