KM5
Oblique fine twisted Hi-yarn upper, Magic Carpet supercritical sheet insole, 270° 3D locked carbon fiber propulsion system, full-length PEBA integrated super midsole, AGCS all-weather wear-resistant and non-slip outsole
- Find your size in the chart below.
- Scroll horizontally to see more sizes.
| US - Women's | 2.5 | 3.5 | 4.5 | 5.5 | 6 | 6.5 | 7.5 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| US - Men'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) 8 : 7.09 oz (201 g)
Heel Stack
27 mm
Forefoot Stack
23 mm
Heel-Toe Offset
4 mm
Oblique Fine Twisted Hi-yarn Upper
It features a fine twisted Hi-yarn upper with oblique weaving to create breathable pores, making it more breathable, resilient and durable. Built-in support reinforcement structure ensures a seamless fit.Paired with the AP-FITx2 dynamic binding system, it locks the arch and adjusts to the instep, adapting automatically to different foot shapes for a truly adaptive fit, creating a technologically advanced and breathable upper.The heel uses bifurcated sponge design for a secure fit during racing without slipping off.
HiFoamPEBA Integrated Super Midsole
Adopts brand-new PEBA one-piece molding technology.While reducing the weight of the midsole, it features higher density, better anti-degradation performance, enhanced resilience and toughness, improving energy feedback efficiency for superior rebound.Compared with the KM3, the forefoot is widened by 3mm and the heel by 1mm, enhancing grip while maintaining athletic flexibility and greater stability.
Hifoam∞ Dual-Layer "Dynamic Motion" Midsole
Crafted with the innovative HIRACER midsole foaming technology, it forms uniformly distributed, specially structured air cells to reduce midsole weight while delivering enhanced shock absorption. It boosts energy return rate, shortens rebound time, and creates optimal endurance conditions for kilometer runs.
AGCS All-Weather Wear-Resistant & Non-Slip Outsole
All Ground Control System The outsole is made of polyurethane material, providing stronger grip, better anti-slip performance on wet surfaces, and superior wear resistance.Compared with the KM3, the outsole tread density is increased to extend the lifespan of the running shoe.