SHOES FOX UNION BOA 2025
High-performance footwear to improve your riding sessions
The all-new Fox Union BOA® Clipless shoes are ready to take your mountain biking adventures to new heights. We have once again improved our most loved footwear, this time by optimizing the fit and structure, as well as giving it a completely new upper (a TPU welded upper with ripstop fabric to offer an even more durable and breathable shoe). Increase power transfer to the pedal and better customize the fit thanks to the dual BOA® Li2 system. Built with rugged features, including a molded toe to protect against impacts from rocks and gravel, Fox Union mountain bike shoes easily handle even the most challenging trail runs.
FOX UNION BOA 2025 KEY FEATURES:
- New sole with D3O® shock-absorbing insert
- TPU/ripstop welded upper
- The Dual BOA® Li2 system offers on-the-fly micro-adjustments and improved power transfer to the pedals
- The molded toe protects against impacts from rocks and gravel
- Modular dorsal and plantar arch support for a customized fit
- The internal reinforced plate, shaped, optimizes pedaling power without compromising comfort when walking
- Ultratac™ rubber compound provides levels of grip and durability never seen before
- The two-bolt cleat system is compatible with all major pedal manufacturers
FIT
- The shoes have a standard fit, use your usual size
- Size is uniform across all models: Fox Union BOA®, Fox Union, Fox Union Flat, and Fox Union Canvas
SIZE CHART
SIZE CHART
| EU Size | US Men's Size | US Women's Size | US Children's Size | UK Size | 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 |
SHOES FOX UNION BOA 2025
High-performance footwear to improve your riding sessions
The all-new Fox Union BOA® Clipless shoes are ready to take your mountain biking adventures to new heights. We have once again improved our most loved footwear, this time by optimizing the fit and structure, as well as giving it a completely new upper (a TPU welded upper with ripstop fabric to offer an even more durable and breathable shoe). Increase power transfer to the pedal and better customize the fit thanks to the dual BOA® Li2 system. Built with rugged features, including a molded toe to protect against impacts from rocks and gravel, Fox Union mountain bike shoes easily handle even the most challenging trail runs.
FOX UNION BOA 2025 KEY FEATURES:
- New sole with D3O® shock-absorbing insert
- TPU/ripstop welded upper
- The Dual BOA® Li2 system offers on-the-fly micro-adjustments and improved power transfer to the pedals
- The molded toe protects against impacts from rocks and gravel
- Modular dorsal and plantar arch support for a customized fit
- The internal reinforced plate, shaped, optimizes pedaling power without compromising comfort when walking
- Ultratac™ rubber compound provides levels of grip and durability never seen before
- The two-bolt cleat system is compatible with all major pedal manufacturers
FIT
- The shoes have a standard fit, use your usual size
- Size is uniform across all models: Fox Union BOA®, Fox Union, Fox Union Flat, and Fox Union Canvas
SIZE CHART
SIZE CHART
| EU Size | US Men's Size | US Women's Size | US Children's Size | UK Size | 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 |
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