Designed for the beginner skier who prioritizes comfort, warmth, and convenience in their ski boot, the Mach Sport HV 70 is specially built for skiers with high-volume feet. Designed with a 103 mm last, the Comfort Celliant liner increases circulation for optimized warmth and performance. If needed, you can add personal customization with Tecnica‚Äôs C.A.S. system to solve any additional fit problems. Double Quick-Instep and Lift-Lock buckles make for easy entry and exit, and the 70 flex is our most forgiving for all-day on (and off) mountain comfort.