Leatt gets why you do what you do. And they get that chasing the Thrill comes at a cost. So Leatt has you covered. With an ever-evolving range of neck braces, helmets, body armor, braces, guards, hydration systems - whatever it takes to keep the committed Thrill seeker safer. FlexLock boot strap kit for use with the Leatt GPX 5.5 FlexLock Boots. Sold as a four-piece set.