The Roxa R/Fit Pro 110 is the perfect option for advanced intermediate to expert level skiers with a medium forefoot and medium calf volume. The new overlapping shell and cuff design deliver consistent flex for better power transmission as you drive into the boots. The OptiLock buckle allows you to fine tune the feel of the buckle over the instep area for a comfortable fit, avoiding any pinching or uncomfortable spots. A BioFit shell and BioFit Liner allows you to heat mold the shell and liner for a custom fit to your foot after taking the boots to a qualified ski shop. Enhance your time on the slopes with a boot that can handle any all mountain challenge with the Roxa R/Fit Pro 110. Best Fits a Medium Forefoot and Medium Calf Volume. 4D BioFit Liner- Pre formed EVA foam liner that can be heat formed.OptiLock- Allows for a better instep fit and foot hold.Next Gen Design- Ultra light, two piece design for consistent power transmission.BioFit- Fully heat formable shell after taking it to a qualified ski shop.GripWalk Soles- Better traction on uncertain surfaces.