The Karhu Fusion 4.5 is the latest iteration of the brand's popular neutral trainer, designed for a plush and propulsive ride. It offers a streamlined fit that facilitates a smooth transition from heel strike to toe-off.

• Refined IdealKnit mesh upper 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
• Colorway: Bit of Blue / Skydiver