60 Flex Index: Great for beginners and intermediate skiers that need a forgiving boot to give comfort throughout the day. * 104mm last: Comfort is key for skiers matching up to this last width. * 30mm Power Strap: A velcro strap, 30mm in height, acts as an extra buckle to keep the top of the boot together. * Replaceable Toe and Heel Pads: This is a must-have for skiers that don"t live in ski in/ski out condos. * Boot Heater Prepared: The liner is prepared to accept most boot heating systems.