The women's KARHU Fusion 4.0 is crafted to take your running experience to the next level, providing effortless propulsion with every step.
This shoe is a perfect choice for runners in search of t neutral running shoes that also deliver the speed and performance of fast running shoes.

The redesigned Fusion 4.0 offers a plush, responsive ride that’s ideal for neutral runners. With new features and enhancements, it excels at creating a smooth heel-to-toe transition, ensuring a dynamic and responsive feel underfoot, regardless of your pace. The update incorporates soft IdealKnit mesh for enhanced breathability and comfort, while the nitrogen-injected AeroFoam midsole provides increased rebound. Additionally, the deflection channel at the base of the midsole improves impact absorption, delivering an even more cushioned running experience.

The KARHU Fusion 4.0 is an all-in-one option for runners who value comfort, performance, and responsiveness. At KARHU, we recognize that every runner’s feet are different, and this understanding shaped the latest updates to the Fusion 4.0.

Technologies Karhu Fusion 4.0
-Fulcrum + Propulsion Unit
-IdealKnit
-Ortix Fit
-Nitrogen-infused AeroFoam midsole
-M-Lock lacing system

Weight US8: 250g / 8.8 oz
Heel-to-toe drop: 6m

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The women's KARHU Fusion 4.0 Sea Foam / Excalibur provides a plush and propulsive ride ideal for the neutral runner. New additions and adjustments to the Fusion 4.0 make this shoe exceptional at seamlessly accelerating the transition from heel to toe-off, ensuring a responsive underfoot experience regardless of pace.

This update utilizes soft IdealKnit mesh for improved breathability and comfort. Most notable is the incorporation of new nitrogen-injected AeroFoam in the midsole. This upgraded foam provides increased rebound, while the addition of a deflection channel at the bottom of the midsole helps absorb impact and provides a more cushioned experience.

The KARHU Fusion 4.0 is the ultimate all-in-one shoe for runners seeking a unique blend of comfort, responsiveness, and performance.

Details Karhu Fusion 4.0
-Shortened Fulcrum + Propulsion unit for an efficient stride
-Nitrogen-infused AeroFoam midsole
-Updated IdealKnit mesh construction with improved breathability
-M-Lock lacing construction ensures a secure midfoot

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The women's KARHU Fusion 4.0 is a highly responsive, cushioned running shoe for neutral-footed runners. It is sure to elevate your run and propel you forward.

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Size UK 5.5 - Sale

WOMEN'S FUSION 4.0

TEMPEST / PISTACHIO SHELL

WOMEN'S FUSION 4.0

SKYWRITING / WHITE JADE

WOMEN'S FUSION 4.0

SEA FOAM / EXCALIBUR

WOMEN'S FUSION 4.0

ETHEREA / SHADOW LIME