USD
- 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 : 7.23 oz (205 g)
Heel Stack
29.7 mm
Forefoot Stack
25 mm
Heel-Toe Offset
4.7 mm
HI-FIBER Woven Upper with High-Strength Compact Yarn
Made with fibers finer than human hair, the finely woven HI-FIBER upper features breathable micro-openings created through a specialized weaving process for enhanced ventilation, toughness, and durability. An integrated reinforcement structure ensures a seamless, snug fit. Combined with the dynamic AP-FIT lacing system, it adapts to different foot shapes around the instep to create a technologically advanced, highly breathable upper.
HiFoam Max + HiFoam∞ Upper Midsole Layer Made from Foamed Sheet Material
Upper Midsole Layer: Made from an eco-friendly, supercritically foamed ATPU sheet and shaped through a secondary compression-molding process, it delivers higher density, enhanced fatigue resistance, excellent toughness and elasticity, improved energy-return efficiency, and highly responsive rebound.Lower Midsole Layer: Manufactured using the “Dynamic Motion” foaming process, it reduces midsole weight while improving shock absorption. The process enhances energy return and delivers powerful rebound.
HiCarbon Full-Length Asymmetrically Shaped Reinforced Carbon Plate
Carbon fiber layers are arranged in multiple directions to meet dynamic movement demands. Three reinforcing ribs at the arch increase the torsional rigidity and durability of the carbon plate, providing greater stability and more powerful propulsion. The plate’s rapid energy return helps drive every stride forward. Its asymmetrical shape extends upward along the lateral arch to improve stability during smooth cornering.
KPU Highly Wear-Resistant and Slip-Resistant Outsole
Full-coverage slip-resistant KPU granules provide enhanced traction on wet surfaces, superior wear resistance, and secure grip in slippery conditions.
These shoes are really comfortable and look great too. My kid wore them to his school track meet and ended up doing really well. The shoes performed great, and we’re very happy with them.
Love these! They fit snugly and feel secure. So lightweight—I mean, seriously light!