The Salomon Shift Pro 90 AT is an awesome option for advanced intermediate to expert level ladies with a medium wide forefoot and medium calf volume. Custom Shell HD incorporates a thinner wall construction that brings more power transmission to the boot and allows the Shift to be custom heat molded in a matter of minutes after bringing it to a qualified ski shop. My Custom Fit 3D Seamless Liner delivers lots of comfort and warmth for longer sessions on the slopes. When you're getting ready to skin up hill, simply unlock the Surelock Skiwalk Mechanism and enjoy maximum range of motion for effortless walking motions. Integrated Tech Inserts allows the Shift to be compatible with most touring bindings. GripWalk soles are added for better traction on icier surfaces around the resort or when you're walking back to the car after a long shred session. Sensifit Insert incorporates softer PU on the external part of the boot to make entry into the boot easier. Get yourself into the world of the unknown with the Salomon Shift Pro 90 AT Boot for Women. Best Fits a Medium Wide Forefoot and Medium Calf Volume, My Custom Fit 3D Seamless Perf Liner, Custom Shell HD, Surelock Skiwalk Mechanism, Sensifit Insert, Integrated Tech Inserts, 35mm Strap, 4 Riveted Aluminum 3D Buckles, 1 Hiking Hook, GripWalk Soles, This Boot is Only Compatible with Bindings Stamped GripWalk (GW) or Multi Norm Certified (MNC), Actual Flex: 90, Cuff Alignment: None, Warranty: One Year, Ski Boot Width: Medium Wide (102-103mm), Flex: Stiff, Used: No, Ski/Walk: Yes, Forefoot Width: 100-106mm (Custom Shell HD), Flex Adjustment: No, Buckle Count: 4, Category: Alpine Touring, Ski Gear Intended Use: Side Country/ Backcountry, Instep Height: Medium, Calf Volume: Medium, Skill Range: Advanced Intermediate - Expert, Model Year: 2021, Product ID: 613170, Model Number: L41168100235, GTIN: 0193128302450