Running shoes / Road running shoes / Karhu
Karhu · women
Fusion 4.0
Skywriting / White Jade
No stock at tracked retailers
Sizes at best price (UK)
No sizes in stock at tracked retailers.
Colourways — prices differ
Where to buy
No stock at tracked retailers right now.
In stock in: Sea Foam / Excalibur £70.00, Tempest / Pistachio Shell £84.00
On paper
The Fusion 4.0 is a road shoe from Karhu.
We track 3 colourways of this shoe. This Skywriting / White Jade build is out of stock everywhere we look; 2 other colours are in stock from £70.00. Retailers clear colour by colour, so that can change without notice.
From Karhu
Experience the unique blend of comfort, responsiveness, and performance with the Women's Karhu Fusion 4.0.
The AeroFoam midsole, now nitrogen-infused, provides the right balance of cushion and responsiveness. The midsole has an increased rebound, with the addition of a deflection channel that helps to absorb impact. The IdealKnit upper has been updated for a more breathability and comfort.
A shoe designed by women for women, the women's Fusion 4.0 encompasses HeraFit, a personalised women's construction of the circumference volume adjustment at the instep and forefoot.
Shortened Fulcrum + Propulsion unit for an efficient stride.
Manufacturer's description, supplied via the retailer feed.
Other versions of this model
Same model, another edition or build — every colourway in stock, cheapest first.
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Same surface and sex, closest on drop, weight, support and price. Cheapest colourway of each.
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Kit that goes with this, in stock now — a spread of prices, not our picks.
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