The Salomon X-Pro 90 W is an excellent ski boot for the strong intermediate to expert skier who want fast and easy customization and powerful skiing. Salomon's TwinFrame2 Technology adds lightweight reinforcements to the spine and sole of the shell that adds responsiveness and control when you are ramping up the speed. The 360 Degree Custom Shell allows an Authorized Salomon Dealer to fully customize the shell in less than an hour. The bootfitter will heat the shell in a special oven, and then place the hot shell on your foot. As the shell starts to cool it will mold and adapt to the shape of your foot. The My Custom Fit 3D Performance Liner also has heat moldable properties that deliver a dialed in fit inside the boot. A Women Calf Adjuster on the back spine helps you dial in the fit across your calf muscle for added comfort. A 24mm Oversized Pivot connects the upper cuff to the lower shell with a strong amount of energy transfer to your skis. If you want a strong boot, that is simple to have customized, the Salomon X-Pro 90 W is a great choice.