With a highly customizable design, the Salomon S/Pro Alpha 90 W GW Boot keeps us comfortable whether we hit the resort for a few morning laps or ski the mountain until the lifts stop running. The step-in design lets us easily slip our boots on in the parking lot, and the seamless liner minimizes friction while we dig in our edges on tight turns. The Flex Adjuster allows us to find the perfect amount of stiffness to balance comfort and control, while the heat-moldable liner and shell provide a personalized fit.