Product Description: The Tecnica Mach Sport HV 100 is a comfort-oriented all-mountain boot that balances easy entry and all-day warmth with real on-snow performance. A C.A.S. heat-moldable shell and liner dial in a personalized fit, and the HV-volume last suits a roomier, high-volume foot. 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. C.A.S. Liner: A heat-moldable liner customizes to the exact shape of your foot for comfort and control. Quick Instep: A softened instep zone makes stepping in and out noticeably easier, even on cold mornings. 100 Flex: A 100-flex rating built for strong intermediate-to-advanced skiers. Colorway: Race Grey.