The Mach 1 MV 120 TD is a high-performance ski boot designed for advanced skiers with medium-volume feet who seek on-mountain performance, a comfortable yet precise fit, and a high level of customization. Based on the fundamentals of high-performance ski boot design, the MV 120 features T-Drive technology, a revolutionary connection between the shell and cuff that allows the boot to operate much more efficiently. The result is a smoother, more consistent flex, better performance, and less energy required to ski at a high level. When you add the Asymmetrical Power Transmission shell and cuff design to the equation, you get a boot with a precise feel that is perfectly at home on any type of terrain or snow condition. Fit is the MV 120's number one priority, and Custom Adaptive Shape CAS technology is the way to achieve it. Developed with an anatomically shaped shell and liner, CAS technology offers an excellent fit right out of the box, but allows for full customization if needed. Ski everything and ski well.