The Exo Wrap 4D Race body structure together with fine-adjustable Boa technology give the final touch to the boot's great fit. - The last is between 100 and 101 mm - just a hair on the wide side - Flex: 130 - Customizable tongue allows for adding or removing 8 mm of foam - Custom Shell HD: thermomoldable - Polyurethane insert for easy on and off - Race liner boot with elastic band at the front, and new, latex-based foams - A metal plate connects ankle and shell together, for proper support and gradual flex for turns - GripWalk Premounted ISO 23223 - SensiFit mesh for enahnced fit - Sensitive² insoles with a supportive heel - Race-ready 50 mm strap and two aluminium buckles