The Tecnica Mach1 HV 120 is designed for high performance skiers with high-volume feet. The Mach1 series is famed for their all-mountain performance, precise and customizable fit, and effective power transmission from leg to boot due to the CAS shell construction. The T-Drive Spine creates more snap and power throughout turns to enhance performance. With a 103mm last, this boot accommodates those wider feet needing more room. Expect to charge hard with this high-end performance boot.