The Salomon S Pro 120 GW Ski Boot is a great option for advanced to expert level skiers with a medium forefoot and medium calf volume. With a 120 flex, this boot skis as well as any boots in its matching flex class, (Not to mention many 130 flex models) that has the ability to charge hard. A 100 millimeter last can be expanded to accommodate wider feet. A Sensfit Insert uses softer PU on the external part of the shell making it effortless to step into your boot. The My Custom Fit 4D Hybid Pro Liner hugs your foot and provides maximin comfort for all day epics at the resort. The Custom Shell HD Shell and Cuff uses thinner materials in the construction process resulting in a lightweight and performance built boot. Coreframe 360 ensures a pro fit for proper power transmission and enhanced feel that delivers precise terrain feedback and maximum power transfer to the edges of your ski.