The Salomon QST Pro 120 TR is an excellent boot for advanced to expert skiers looking to take on the mountain in bounds and out. Salomon's Motion Fit and Endofit Tongue deliver a 40 Degree Range of Motion when you flip the lever into hike mode for efficient and easy skinning or hiking your way up to some fresh turns. The TwinFrame2 Technology adds a lightweight reinforcement to the sole of the boot that prevents torsional twisting and adds responsiveness at high speeds. The 24mm Oversized Pivot adds a burly connection between the upper cuff and lower shell with a high amount of energy transmission towards your skis. The 360 Degree Custom Shell can be customized in less than an hour for your foot by an Authorized Salomon Dealer who will heat the shell in a special oven. Once the shell it hot enough the boot is placed on your foot. When the shell starts to cool, it will mold to your foot shape. The My Custom Fit 3D Pro Liner is also fully customizable by heat for a truly dialed in fit. Premounted Touring Soles can help you access the backcountry easier, or if you are strictly staying in the resort you can swap them out for the included DIN Pads. Best Fits Most Foot Shapes After the Molding Process and Medium to Narrow Leg Shapes, 360 Degree Custom Shell, TwinFrame2, Endofit Tongue, My Custom Fit 3D Pro Liner, Motion Fit, 24mm Oversized Pivot, 40 Degree Range of Motion in Walk Mode, Premounted with Touring Pads, DIN Soles are Included in the Box, Actual Flex: 120, Cuff Alignment: None, Warranty: One Year, Ski Boot Width: Medium (99-101mm), Flex: Very Stiff, Used: No, Ski/Walk: Yes, Forefoot Width: 100mm+ Custom Shell, Flex Adjustment: No, Buckle Count: 3, Category: Side Country, Ski Gear Intended Use: Side Country/ Backcountry, Instep Height: Standard, Calf Volume: Standard, Skill Range: Advanced Intermediate - Expert, Model Year: 2019, Product ID: 530672, Model Number: L40553600265, GTIN: 0889645658414