The Mach1 HV 130 is the go to boot for high level, all-mountain chargers. Grounded in the fundamentals of classic ski boot design, the HV 130 features T-Drive technology which allows the boot to function in a much more efficient way, resulting in a smoother more consistent flex. Developed with a high volume anatomically shaped shell and liner, the C.A.S. technology provides a great fit right out of the box but allows the boots to be fully customized if need be.