The Soma Vacuum Hybrid W10 has a trilogy of technology: all-mountain advanced through expert skiers can benefit from the 100 flex and Soma technology, which creates a comfortable stance by positioning feet in their natural V position. Fischer’s VacuumFit technology provides a custom molded lightweight shell that, when heated, fits the contours of each individual foot and lower leg. “Hybrid” means the boot has three-settings: hike, ride, and a race-performance lock mode. Note: this boot's last size can range from 96 to 106 mm.