EUR
CPA PRO
Built for speed, these racing shoes combine a breathable HI~FIBER woven upper with reinforced support for a secure, seamless fit. The Power Capsule uses a nano-film seal to retain nitrogen, helping preserve responsive cushioning and stability. A full-length carbon plate with an upturned forefoot enhances toe-off efficiency and propulsion. Underfoot, the H-PEBAX crystal nylon elastomer outsole, six-spike layout, and wavy triangular pillars deliver energetic rebound, secure grip, and fast strides.
- Find your size in the chart below.
- Scroll horizontally to see more sizes.
| US - Men's | 2.5 | 3.5 | 4.5 | 5.5 | 6 | 6.5 | 7.5 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| US - Women's | 4.5 | 5.5 | 6.5 | 7.5 | 8 | 8.5 | 9.5 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| EU | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 |
| CM | 22 | 22.5 | 23 | 24 | 24.5 | 25 | 25.5 | 26 | 27 | 27.5 | 28 | 29 | 29.5 | 30 |
| UK | 2 | 2.5 | 3.5 | 4.5 | 5.5 | 6 | 7 | 7.5 | 8.5 | 9 | 10 | 11 | 12 | 13 |
Size Measuring Guide
A perfect fit for your ultra-marathon running shoes is important for comfort and performance. Follow these tips to measure your foot size at home:
General Tips:
- Measure your feet at the end of the day as they're at their largest due to swelling.
- In between sizes? One foot is bigger than the other? Take the larger size.
- It's best to measure every year. Your size could change over time.
What You'll Need:
- A piece of paper larger than your foot,
- A pen or pencil,
- A ruler or measuring tape,
- Socks of the thickness you'll wear with the shoes.
Steps:
- Stand on the paper in the socks you'll wear with the shoes.
- Use the pen or pencil to mark the end of your longest toe and the back of your heel. It's important to measure both feet as their size can vary.
- Match your measurements to our size chart to find the best fit. If you're between sizes, we suggest choosing the larger size for better comfort.
Weight
US (M) 7.5 / US (W) 9.5 : 5.89oz (167.2g)
Heel Stack
18.7 mm
Forefoot Stack
19.8 mm
Heel-Toe Offset
1.1 mm
HI~FIBER High-Strength Woven Upper
Crafted with a special weaving process to boost foot containment and deliver outstanding durability. Built-in reinforced support structure offers seamless fit. Paired with an integrated tongue, it forms a tech-forward breathable upper.
Power Capsule
Built on HIRACER custom supercritical elastomer, it innovatively adopts a high-barrier polymer nano-film edge wrapping all around. Nano-level dense airtightness locks high-purity nitrogen, greatly reducing performance degradation caused by gas leakage. Rigid edge constraint restricts lateral deformation of the material, significantly boosting rebound efficiency and support stability.
Full-Length Carbon Propulsion System
Engineered with an upturned shovel-shaped forefoot structure following the biomechanical lever principle. It effectively extends the lever arm at the toe box and cuts energy loss during toe-off. Combined with high-stiffness carbon fiber material, it improves landing stability and forefoot rebound response, delivering powerful propulsion for starts and mid-stride running.
Full-Length H-PEBAX Crystal Nylon Elastomer Outsole
Engineered for speed, HI~FIBER woven upper delivers breathable comfort, durable containment and a seamless fit. Power Capsule locks in nitrogen with nano-film wrapping, preserving rebound while enhancing support. A full-length carbon plate with an upturned forefoot boosts toe-off efficiency and propulsion. The full-length H-PEBAX crystal nylon elastomer outsole delivers fast energy return, while a 6-spike layout and wavy triangular pillars provide reliable traction and stability on every stride.