Karhu Men's Fusion 4.0 Running Shoe Womens Neutral Shoes Designed for eyebrow-raising efficacy over

Designed for eyebrow-raising efficacy over distances of 1500m and above

This shoe's upper is made with a high-performance yarn which contains at least 50% Parley Ocean Plastic reimagined plastic waste

The Supernova Rise is designed to keep you comfy mile after mile

no matter what your day has in store

Karhu Men's Fusion 4.0 Running Shoe Womens Neutral Shoes Designed for eyebrow-raising efficacy overThe KARHU Fusion 4. 0 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