Karhu Fusion 4.5
Women's
Running
Shoes
View Men's
$160
Features
Find the perfect balance of cushioning and speed in the Karhu Fusion 4.5.
Built to help you find your running rhythm, the Fusion 4.5 combines Karhu's responsive AeroFoam Nitro midsole with their signature compact Fulcrum technology to deliver the most pronounced "roll" in the Karhu collection. With smooth transitions at any pace and a geometry designed for exciting toe-offs, this trusted daily trainer is ready to tackle everything from long runs to tempo workouts.
Details:
- Upper: The refined IdealKnit construction enhances breathability and comfort while maintaining a snug, streamlined fit. Broader laces and a soft, redesigned tongue give you a secure, premium feel that locks your foot in place. Strategic reflective detailing increases visibility during low-light runs.
- Midsole: The AeroFoam Nitro foam delivers responsive cushioning that feels both cushioned and quick underfoot. Combined with Karhu's compact Fulcrum technology, it creates an efficient, propulsive ride with smooth transitions that make every stride feel effortless.
- Outsole: Engineered with a geometry that supports dynamic toe-off, helping you maintain momentum through your gait cycle with confidence and control.
Tech Specs
Karhu Fusion 4.5
| Weight |
8.7 oz (W), 10.6 oz (M)
|
|---|---|
| Stack height (heel/forefoot) |
28 mm/22 mm
|
| Heel-to-toe drop |
6 mm
|
| Experience |
Smooth
|
| Surface |
Road
|
| Category | neutral |
What's New
The Fusion 4.5 returns with the same high-performance platform that runners love. The refined IdealKnit upper offers enhanced breathability, and the broader laces with a redesigned tongue provide an even more premium fit. The signature compact Fulcrum and AeroFoam Nitro combination continues to deliver Karhu's most pronounced rolling sensation.
Who It's Best For
The Karhu Fusion 4.5 is perfect for runners seeking a balanced trainer that excels across multiple training runs and workouts. It's ideal for runners with high, rigid arches who want neutral support with a touch of rearfoot stability. The snug, streamlined fit makes it especially great for those who prefer a more locked-in feel during both long runs and tempo workouts.
Why You'll Love It
You'll love how the Fusion 4.5 makes every training run feel smooth and efficient, giving you the confidence to roll through miles with that signature Karhu sensation. Whether you're building endurance or pushing the pace, this shoe delivers the perfect blend of cushioning and responsiveness to keep you moving forward.
