The Head Vector EVO 120 is a high powered ski boot for advanced to expert skiers that have a medium to narrow foot shape, and medium sized leg shape. The Vector EVO 120 uses Head's new Form Fit Technology that allows an authorized Head Dealer to fully customize the shell to your foot. A bootfitter will set the boot into a special oven, then on your foot. When the shell cools down it can stretch out to match the shape of your foot, to give you a fully customized shell in less than a half hour. The Perfect Fit Liner is also 100% fully customizable to give you a truly dialed in fit. The Vector Line has the EVO Stance that moves the hinge position between the upper and lower cuff 18mm back on the shell to give you a more progressive flex, meaning the harder you charge and the faster you ski the stiffer the boot becomes. The Vector EVO 120 uses Spine Tech Buckles to give you a snug wrap around your foot by having flexible buckles. If you are an aggressive skier looking for a boot that can be fully customized for you, the Vector EVO 120 from Head is a perfect selection.