Built for runners seeking a smooth and energetic ride, the KARHU Fusion 5.0 introduces the next generation of the trusted neutral trainer.

A repositioned Fulcrum unit guides the foot efficiently through each stride, creating a more propulsive running experience. Combined with an amplified toe spring, the Fusion 5.0 delivers a responsive toe-off with added momentum and energy return. The midsole features all-new AeroFoam NOVA, allowing for a higher stack height and a softer, more cushioned ride with improved rebound. A critical foam insole provides durable underfoot comfort that maintains its performance over time.

Designed for a balanced fit, the Fusion 5.0 offers a secure midfoot lockdown while maintaining ample room in the toe box, creating a comfortable running experience for everything from daily training to longer mileage days.

Technologies of the KARHU Fusion 5.0
- Repositioned Fulcrum unit for a more propulsive ride 
- AeroFoam NOVA midsole with increased stack height 
- Critical foam insole for long-lasting cushioning 
- Amplified toe spring for an energetic toe-off 
- Secure midfoot fit with a spacious toe box 
- Engineered upper construction for comfort and support 

Weight US8: 240 g / 8.5 oz
Heel-to-toe drop: 33 mm – 27 mm

Size guide

STEP 1

Place a piece of paper on the floor with one end against the wall. Put your foot on the piece of paper with your heel against the wall.

STEP 2

Take a pencil and mark the end of your longest toe on the paper. Repeat for your other foot.

STEP 3

Measure in cm from the wall (heel) to the longest point (toe). Take the larger measurements. Than take what you measured + 0.5 CM and compare it with our shoe sizes in the size chart.