Fox Union Boa Flat Shoes - Dark Shadow 2025

Fox Union Boa Flat: High-performance shoes to enhance your ride experience

The Fox Union BOA® Flat shoes are designed to boost your confidence to new levels on your MTB adventures. Tailored for the trails, these shoes provide a personalized fit thanks to the integrated Dual BOA® Li2 system. Our flagship model pushes boundaries once again with a completely redesigned upper (combining welded TPU and ripstop for durability and improved breathability), as well as enhanced construction and fit. This flat-pedal version of the Fox Union BOA® offers perfect grip on platform pedals and features rugged elements, including a molded toe cap to protect against rock impacts. Lightweight and well-fitted, their low-profile EVA midsole—specifically developed for this model—improves pedal feel and grip for greater comfort. The molded internal reinforcement plate maximizes power transfer without compromising off-the-bike comfort. The outsole is made from our Ultratac™ rubber compound, with lug patterns that deliver class-leading grip and durability. Versatile and sleek, the Fox Union BOA® Flat MTB shoes are made to follow you everywhere—from the trail to that well-earned post-ride beer.

Key Strenght

• Dual Boa lacing system for a perfect fit
• UltraTac rubber sole for unmatched grip
• Multiple impact protection features
• D3O insert for improved cushioning and comfort

Specifications

• New outsole with D3O® damping insert
• Welded upper combining TPU and ripstop
• Dual BOA® Li2 system for on-the-fly micro-adjustment and better power transfer
• Molded toe cap to protect against rock impacts
• Lower or upper arch support for a customized fit
• Molded internal reinforcement plate optimizing power transfer and off-bike comfort
• Ultratac™ rubber for outstanding durability and grip

Size Info

• This model runs large, we recommend sizing down from your usual size

Size chart here