Dial in power and fit. The all-new Fox Union BOA® Shoes are set to take your mountain bike adventures to new and more confident levels of you. Get more power to the pedal and customize your fit to perfection with the dual BOA® Li2 system featured in these trail-ready shoes. Built with robust features including a molded cap design to protect against rock strikes, the Fox Union mountain bike shoes handles the rigors of trail abuse with ease.