The Salomon X Pro X90 Ski Boots give you the performance advantages of the stiffer X Pro boots with a more user friendly flex pattern. TwinFrame design gives the X Pro 90 the stiffness to transmit energy to your skis while keeping other parts of the shell soft for comfort and ease of entry. The X Pro X90 is designed for an average to slightly wider than average foot and average to slightly taller than average instep, and offers exceptional heel hold.