Product Description: The Tecnica Mach1 MV 120 is a performance all-mountain boot trusted by hard-charging skiers for its precision and power. A medium-volume C.A.S. shell, T-Drive power link, and heat-moldable liner deliver a locked-in, race-room feel with all-day comfort. Features: C.A.S. Shell: The Custom Adaptive Shape shell can be heat-punched and ground by a bootfitter for a precise, pressure-free fit. T-Drive: A power-transmission link between cuff and shell delivers smooth, immediate energy to the ski. C.A.S. Liner: A heat-moldable liner customizes to the exact shape of your foot for comfort and control. 120 Flex: A 120-flex rating built for advanced-to-expert skiers. Colorway: Dark Progressive Green.