Get a grip on freedom and control
Fox Union BOA® Diffuse Special Edition 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.
- Combined TPU/Ripstop welded upper
- The BOA® Fit System featuring dual dial Li2 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
- Proprietary Ultratac™ rubber compound and engineered tread pattern provide best in class grip and durability
- D3O® insole for added protection and vibration reduction
Size Guide
| Size EU | US (Mens) | US (Womens) | US (Youth) | UK Size | Japan / CM Size |
|---|---|---|---|---|---|
| 37 | 5 | 6.5 | Y5 | 4 | 23.5 |
| 38 | 6 | 7.5 | Y6 | 5 | 24.5 |
| 39 | 7 | 8.5 | Y7 | 6 | 25.1 |
| 40 | 7.5 | 9 | Y7.5 | 6.5 | 25.8 |
| 41 | 8 | 9.5 | Y8 | 7 | 26.5 |
| 41.5 | 8.5 | 10 | - | 7.5 | 26.8 |
| 42 | 9 | 10.5 | - | 8 | 27.1 |
| 42.5 | 9.5 | 11 | - | 8.5 | 27.5 |
| 43 | 10 | 11.5 | - | 9 | 27.8 |
| 43.5 | 10.25 | 11.75 | - | 9.25 | 28.1 |
| 44 | 10.5 | 12 | - | 9.5 | 28.5 |
| 44.5 | 11 | 12.5 | - | 10 | 28.8 |
| 45 | 11.5 | 13 | - | 10.5 | 29.1 |
| 45.5 | 12 | 13.5 | - | 11 | 29.5 |
| 46 | 12.5 | 14 | - | 11.5 | 29.8 |
| 47 | 13 | 14.5 | - | 12 | 30.5 |
Launch DateJuly 21, 2026
Days In Market98
VendorFox
Variants4