Fox, Fox Union Boa Flat

High performance footwear to enhance your ride

Fox Union BOA® Flat Shoes are set to take your mountain bike adventures to new and more confident levels of you, providing a customized fit via the dual BOA® Li2 system featured in these trail-ready shoes. Our #1 footwear style has once again raised the bar with another update, this time an all-new upper (a blend of TPU welded upper featuring ripstop to provide a durable and more breathable experience), construction, and enhanced fit.  The flat-pedal version of the Fox Union BOA® mountain bike shoes stick confidently to your platform pedals and are built with robust features including a molded cap design to protect against rock strikes. With a lightweight and precise fit, the low-profile, custom-tuned EVA midsole ratchets up your pedal grip and feel, giving you more comfort while you shred. Power to the pedal is optimized care of the molded internal stiffening plate, but it's not stiffness at the expense of off-bike comfort. The sole is designed using the Ultratac™ rubber compound, with the engineered tread pattern providing best-in-class grip and durability. Versatile and with understated style, Fox Union BOA® Flat Shoes were born to rip, transitioning from sweet single track to your post-ride tailgate brews with ease.

Tech Specs:

• New outsole featuring a D3O® cushioning insert


• Combined TPU/ripstop welded upper


• Dual BOA® Li2 system provides on-the-move micro-adjustability and improved power transfer to the pedals


• Molded toe cap designed to protect against rock strikes


• High and low arch support options for a custom fit


• Molded internal stiffening plate optimizes power transfer and off-bike comfort


• Ultratac™ rubber compound provides excellent durability and unprecedented grip

• Shoes have a standard fit that's true to size, take your normal shoe size


• Sizing is uniform across all models: Fox Union BOA®, Fox Union, Fox Union Flat and Fox Union Canvas