Salomon X Pro 90 Ski Boots - Women's: Play Boosted X PRO 90W is a benchmark all mountain boot, offering Twinframe 2 boosted performance and women-specific Custom Shell personalized fit. Features: Width: Medium Custom Shell Technology: Yes Weight (A 1/2 pair): 1790g (24.5) Performance: Brand new Twinframe2 design delivers improved rebound and dynamic flex, while oversized pivot provides efficient transmission. Lightweight: A 15% lighter chassis material and lightweight foams make X PRO lighter than ever, for effortless skiing. Women Specific: Women's specific calf adjuster accommodates a wider range, women's specific liner ensures precise and comfortable fit. Liner: Sensitive Footprint: High-performance insole with stiff reinforcement under the heel for more direct sensations My CustomFit 3D Performance Liner: 40% heat moldable liner. 3D is a pre shaped ankle zone for a better fit and support Shell & Cuff: PU Cuff PU/PA Shell: Provides performance and rebound for a more dynamic boot Articulated Overlap: Articulated shell piece allowing a better instep to the boot Technology: Twinframe2: Boosted Chassis for more performance. PU in the upper part of the shell for better wrapping. PA injected in the chassis, the key zone for steering and performance 360Adeg Custom Shell: Inspired by the racing, custom shell is about performance for your ski gear. Racers today needs to drive precisely their 2 skis, they need to feel the terrain to be precise on the ski : Precision is as important than power. Metas are key for Precision, if the shell is too wide you lost precision, if the shell is too narrow, it is painfull so you can't feel the terrain. You need to have the shell at your exact foot shape : you need to have the boot molded to your foot shape. This is exactly what our race technicians do for our racers ; this is exactly what Custom Shell will do to your boot. We develop a specific plastic material Kaprolene that allow us to mold the boot around the foot. This is patented by Salomon. For the Consumer this means he can now pretend to have the top performance boot without foot pains : we're adding comfort to performance.