EUR
KM5
Diagonally woven upper made with finely twisted Hi-Yarn, Magic Carpet insole made from supercritically foamed sheet material, 270° 3D carbon-fiber lockdown and propulsion system, full-length one-piece high-performance PEBA midsole, and AGCS all-weather wear-resistant and slip-resistant outsole.
- 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) 8 : 7.09 oz (201 g)
Heel Stack
27 mm
Forefoot Stack
23 mm
Heel-Toe Offset
4 mm
Twill-Woven Upper with Fine-Twist Hi-Yarn
The upper combines fine-twist Hi-Yarn with a twill-weave construction that creates breathable micro-openings for improved ventilation, resilience, and durability. An integrated reinforcement structure provides targeted support while maintaining a smooth, seamless fit. The AP-FITx2 dynamic fit system delivers secure midfoot lockdown and adapts to different instep profiles for a personalized fit. Split heel padding improves rearfoot hold and helps prevent heel slippage at race pace.
HiFoam PEBA One-Piece High-Performance Midsole
The one-piece HiFoam PEBA midsole is manufactured using an advanced molding process to reduce weight while delivering optimized foam density, improved fatigue resistance, high resilience, and structural toughness. Efficient energy return creates a responsive ride. Compared with the KM3, the forefoot platform is 3 mm wider and the heel platform is 1 mm wider, creating a broader base for improved stability without compromising natural flexibility.
Hifoam∞ Dual-Layer "Dynamic Motion" Midsole
HIRACER’s advanced midsole foaming process creates a uniform, engineered cell structure that reduces weight while enhancing shock absorption. The optimized foam improves energy return for a quicker rebound response and helps maintain consistent cushioning over long distances.
AGCS All-Weather Wear-Resistant & Non-Slip Outsole
The All Ground Control System (AGCS) outsole is made from polyurethane and provides enhanced traction and slip resistance on wet surfaces, along with excellent wear resistance. Compared with the KM3, its denser tread pattern is designed to improve durability and extend outsole life.