Circuit Boa™
Designed exclusively at ThirtyTwo, this never-before-seen technology takes Boa™ beyond all expectations. Featuring style, function, fit and flex, the Circuit Boa™ is the leader in Boa™ advancements. Expect more!
Features
- New exclusive Power Wrap zonal Boa™ Lacing System.
- Articulating Cuff for improved fit, heel hold and smooth flex.
- 3-D Molded Tongue wraps your foot for easy lacing and improved fit.
- Fit System Heel Hold Kit for next level custom fit.
- Inner Ankle Harness for secure inner lacing.
- New low-profile STI Evolution Foam™ midsole/outsole with System G2™ cushioning.
- Level 4P Fit System Liner with anatomical heel retention system.
- Level 3 Fit System Footbed with support frame and System G2™ cushioning.
Flex Level
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
Soft Stiff
Mens Sizes
| USA | Europe | UK | Japan |
|---|---|---|---|
| 6 | 38 | 5 | 24 |
| 7 | 39 | 6 | 25 |
| 7.5 | 40 | 6.5 | 25.5 |
| 8 | 41 | 7 | 26 |
| 8.5 | 41.5 | 7.5 | 26.5 |
| 9 | 42 | 8 | 27 |
| 9.5 | 42.5 | 8.5 | 27.5 |
| 10 | 43 | 9 | 28 |
| 10.5 | 44 | 9.5 | 28.5 |
| 11 | 45 | 10 | 29 |
| 11.5 | 45.5 | 10.5 | 29.5 |
| 12 | 46 | 11 | 30 |
| 13 | 47 | 12 | 31 |