The Salomon X-Pro 100 is always a best-selling ski boot for a wide range of skiers looking for both comfort and performance. Salomon's 360 Degree Custom Shell has the ability to be heat molded by an Authorized Salomon Dealer that has a special oven. Once the heated boot comes out of the oven, the shell is then placed on your foot. When the shell cools it adapts to the shape of your foot for a comfortable and performance oriented fit. The last has the ability to grow up to 106mm for a wide foot. A 24mm Oversized Pivot attaches the upper cuff to the lower shell, and drives energy right to your skis. The Twinframe 2 Construction uses a lighter weight and stronger plastic on the sole of the boots that increase responsiveness and energy transfer when you really start cooking down the mountain. The X-Pro 100 utilizes Thermoformable material in the My Custom Fit Performance 3D Liner that also can be molded for extra comfort on the slopes.