Karhu  MEN'S FUSION 4.0 BRILLIANT WHITE / ANEMONE 

£112.00£140.00

SKU_F101011

Cushion

Guidance

Propulsion

Drop 6 mm

Weight 10.7 oz

Weight 302 g

Colour

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Size advice: Order 0.5 size bigger compared to your regular size.

Please select a size

Fast & free shipping
30 days return policy
Finnish heritage since 1916

The men's KARHU Fusion 4.0 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 midsole. This upgraded foam provides increased rebound, while the addition of a deflection channel at the bottom of the midsole helps absorb impact and provides a more cushioned experience.

The KARHU Fusion 4.0 is the ultimate all-in-one shoe for runners seeking a unique blend of comfort, responsiveness, and performance.

Details Karhu Fusion 4.0
-Shortened Fulcrum + Propulsion unit for an efficient stride
-Nitrogen-infused AeroFoam midsole
-Updated IdealKnit mesh construction with improved breathability
-M-Lock lacing construction ensures a secure midfoot


The men's KARHU Fusion 4.0 is sure to elevate your run and propel you forward.

The Fusion 4.0 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 midsole. This upgraded foam provides increased rebound, while the addition of a deflection channel at the bottom of the midsole helps absorb impact and provides a more cushioned experience.

The KARHU Fusion 4.0 is the ultimate all-in-one shoe for runners seeking a unique blend of comfort, responsiveness, and performance. At KARHU, we know every runner has unique feet, and it’s this as our starting point that has resulted in the newly updated Fusion 4.0.

The KARHU Fusion continues to be built on a growing database of over 4 million 3D scans from runners’ feet.

Technologies Karhu Fusion 4.0
-Fulcrum + Propulsion Unit
-IdealKnit
-Ortix Fit
-Nitrogen-infused AeroFoam midsole
-M-Lock lacing system

Weight US10: 302g / 10.7 oz
Heel-to-toe drop: 6mm


We ship to most countries in the EU. Your order is prepared for shipment on business days the next morning after you placed your order. Typically, the warehouse is able to manage and send out your order the same day, or the next morning after they start processing it!

Size advice: Order 0.5 size bigger compared to your regular size.

Size guide

STEP 1

Place a piece of paper on the floor with one end against the wall. Put your foot on the piece of paper with your heel against the wall.

STEP 2

Take a pencil and mark the end of your longest toe on the paper. Repeat for your other foot.

STEP 3

Measure in cm from the wall (heel) to the longest point (toe). Take the larger measurements. Than take what you measured + 0.5 CM and compare it with our shoe sizes in the size chart.

 
Shoes Length(mm) US Men's Size US Women's Size UK Size EU Size
230 mm 4 5.5 3 35
234 mm 4.5 6 3.5 36
238 mm 5 6.5 4 37
243 mm 5.5 7 4.5 38
246 mm 6 7.5 5 39
251 mm 6.5 5.5  39.5
255 mm 8.5  40 
259 mm 7.5 6.5 40.5 
263 mm 9.5  41.5 
268 mm 8.5 10  7.5 42 
272 mm 10.5  42.5 
276 mm 9.5 11  8.5 43.5 
280 mm 10  11.5  44 
285 mm 10.5 12  9.5  44.5 
289 mm 11  12.5  10  45 
293 mm 11.5 13  10.5 46 
297 mm 12    11  46.5 
301 mm 12.5   11.5 47 
306 mm 13    12  48 
310 mm 14    13  49 

 

TECHNOLOGY

The KARHU Fulcrum technology is designed to keep all forces going forward, reducing braking forces and using your body's natural energy to create a smoother ride. It's what we call the Rolling Effect. Fulcrum Technology provides: Balanced Cushioning, Increased Support, More Energy. The Fusion features a three-quarter length fulcrum.

Karhu United Kingdom
Karhu United Kingdom

OrtixFit shapes your mid sole and upper volumes using data directly collected from over 4 Million runner's feet. What started in 2018 with the launch of the Karhu Ikoni the 1st model shaped by ORTIX, we now offer all our footwear models with our ORTIX Fit, based on actual scanning data in regular, HiVo (more volume) and Hera (women specific) Fit volumes. Karhu collaborates with Volumental(TM) and Fleet Feet(TM) create personalized fit experiences.

Karhu United Kingdom
Karhu United Kingdom

FUSION

Karhu United Kingdom

Guidance

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Propulsion

IKONI

Karhu United Kingdom

Guidance

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MESTARI RUN

Karhu United Kingdom

Guidance

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Customer Reviews

Based on 15 reviews
87%
(13)
13%
(2)
0%
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P
Pasquale D’Alessio (United Kingdom)
How does it fit?:
Too small
Too big
Usual size worn: 10.5
Size purchased: 10.5
Perfect Running Companion

As were my first Fusion 2021 these Fusion 4’s were hugely improved & so supportive & comfy.
Will always get Karhu for running shoes.

A
Anonymous (United Kingdom)
How does it fit?:
Too small
Too big
Usual size worn: 9
Size purchased: 9.5
wearing K since about 35 years.

Never had an issue with my feet. That is why I stay with these shoes. Perfect fit for me.

R
Ralph Schmidt
Ich liebe Karhu Laufschuhe!

Ich trage schon seit über 15 Jahren Karhu Laufschuhe. Immer wieder kaufe ich auch von den Mitbewerbern, dennoch komme ich stets zu Karhu zurück. Preis-/Leistungsverhältnis sind in Ordnung, obwohl die Preise mittlerweile stark gestiegen sind.

MEN'S FUSION 4.0 - BRILLIANT WHITE / ANEMONE

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