Karhu Men's Fusion 4.0 HiVo Running Shoe Recovery A new tongue further enhances

A new tongue further enhances the improved fit and comfort

each step is stronger than the last and performance is kept at its peak

Stretch for added movement and support

The OS1st Performance Knee Sleeve provides medical grade

Experience DNA Tuned

Karhu Men's Fusion 4.0 HiVo Running Shoe Recovery A new tongue further enhancesThe KARHU Fusion 4. 0 HiVo 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