The Tecnica Mach1 95 W is a great boot for the strong intermediate to expert skier that needs a boot that has a medium width forefoot, and narrow shaft of the leg. The C.A.S. (Custom Adaptive Shape) Liner is totally heat moldable, with an anatomical fit that can be easily customized by bootfitters either by punching or grinding the liner itself. Dual Density microcell outer material, a balanced toe box, and lightweight materials will give you a comfortable and performance fit all in one package. Tecnica's Quick Instep has a softer plastic across the top of your foot will make the Mach1 95 very easy for you to enter and exit. The Women's Specific last has a scalloped cuff, heel cradle, and narrower last to keep your foot locked in the proper position and deliver performance right to your skis. If you are an expert skier that is looking for a medium to narrow boot, the Tecnica Mach1 95 W will be a great choice. C.A.S. - Custom Adaptive Shape Shell, Quick Instep, Polyolefine C.A.S. Cuff Adapt, Performance C.A.S. Celliant Liner w/Thermoforming Collar, Double Canting, 35mm Strap, 4 Micro ALU Adjustable Lift Lock Buckles, Best Fit a Medium Forefoot and a Medium Shaft of the Leg, Actual Flex: 95, Cuff Alignment: Dual, Warranty: One Year, Ski Boot Width: Medium (99-101mm), Flex: Medium, Forefoot Width: 100mm, Buckle Count: 4, Category: Downhill, Ski Gear Intended Use: All Mountain, Instep Height: Medium, Calf Volume: Medium, Skill Range: Advanced Intermediate - Expert, Model Year: 2020, Product ID: 573284, Model Number: 20156200 245, GTIN: 0888341673103