The men's Fusion 4.5 is the latest iteration of Karhu's Fusion line, designed as a plush and propulsive neutral trainer. This wide fit version offers a streamlined feel that facilitates a smooth transition from heel to toe-off.

• Refined IdealKnit mesh for enhanced breathability and comfort
• Added reflective details for improved visibility
• Redesigned tongue for a softer, more accommodating, and premium feel
• Nitrogen-injected AeroFoam midsole for superior rebound and cushioning

Brand

Karhu

Style Code

F101019

Colors

white/grey

Listed

February 3, 2026

Model

Fusion 2.0

Gender

men

Category

Apparel & Accessories/Shoes/Sneakers