Liquid Force Hook 4D Wakeboard BootsLIQUID FORCE HOOK 4D WAKEBOARD BOOTS Please note these boots are only compatible with Liquid Force Wakeboards that have the Flex Track Binding System With a medium flex profile for plenty of support and response, yet loose enough to tweak out any grab the Hook delivers all the performance you need. The adjustable Velcro strap makes for a custom feel, Experience the dependability of the Hook 4D. Available Sizes: 8 9, 9 10, 10 11, 11 12, 12 13