Karhu MEN'S FUSION 4.0 SKY GRAY / GREEN FLASH 

$160.00

F101010

Cushion

Guidance

Propulsion

Drop 6 mm

Weight 10.7 oz

Weight 302 g

Colour

Select size

Please review the size guide for more information

Please select a size


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 Fusion 4.0 is also available in a wide fit, KARHU calls this High Volume (HiVo).

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 Fusion 4.0 is also available in a wide fit, KARHU calls this High Volume (HiVo).

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


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!
Delivery & Returns

 

Delivery

We ship orders with in the USA, Mexico, Canada, Australia and New Zealand only. All web orders are shipped from Fife, WA. If you would like to obtain a proof of delivery email us separately, any lost packages or items must be claimed through/with the carrier selected for the shipment.

Please note that during national holidays in the USA we aren't shipping.

Please note that Karhu can't deliver to PO Boxes.

We allow 48 hours for order processing after order placement. This is rare but can occur during peak shipping seasons. All tracking information is emailed 24 hours after the order is shipped.

 

 Country Transit time Carrier Duties & Taxes
USA*/**

 3 to 7 working days

Express shipping in the check-out available.

UPS Paid by Karhu
MX *** 7-21 working days USPS Paid by Receiver
CA *** 7-21 working days USPS Paid by Receiver
NZ *** 7-21 working days USPS Paid by Receiver
AU *** 7-21 working days USPS Paid by Receiver

 

* For shipping to Alaska, Puerto Rico, Hawaii, AFA, AFE and AFP there is a different shipping of $14.95. 

** Orders valued more the $100.- will ship Economy Free of charge. Otherwise there will be a shipping fee of $7.95.

*** Orders shipped outside of the United States are charged a shipping fee of $29.95.

 

 Returns

If you choose to return your product from within the USA for a refund, we will provide a prepaid return-shipping label and a refund for the amount you paid for your purchase, minus a $5.00 restocking fee per item returned. 

If you choose to return your product from outside of the USA for a refund, you will have to return the product at your own expense. We will issue a refund for your purchase, minus a $5.00 restocking fee per item returned.

Only product purchased directly www.karhu.com can be returned to our return processing center. Any unauthorized return of Karhu product will not be accepted or processed at our processing center. The sender of unauthorized returns will be responsible for all return shipment costs.

Return shipment may be sent to:

Regal Logistics
6500-26th Street East
Fife, WA 98424 United States of America

Accompanied by this return form: download here

Important: Product must be clean and the box in proper condition to be accepted.

Under garments such as briefs, boxers, undershorts, underpants may not be returned for size exchange or refunds due to hygienic reasons we can not restock these items.

All sneakers must be in the condition you received them and in the original box.
Warranty related product returns must be shipped to the same address as listed above. All products returned for warranty related reasons will be inspected upon the return of the product.

Please allow 2-3 weeks for processing.

For shipments outside the US or special regions Karhu won't provide a return label. We do except your return taking into account the conditions mentioned above. Please note that you ship your return Duties and Taxes paid. 

Please review the size guide for more information

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.

 
 
Foot & Shoe Size (mm) US Men's Size US Women's Size UK Size EU Size
Foot: 221 mm Shoe: 230 mm 4 5.5 3 35
Foot: 225 mm Shoe: 234 mm 4.5 6 3.5 36
Foot: 229 mm Shoe: 238 mm 5 6.5 4 37
Foot: 233 mm Shoe: 243 mm 5.5 7 4.5 38
Foot: 237 mm Shoe: 246 mm 6 7.5 5 39
Foot: 241 mm Shoe: 251 mm 6.5 5.5  39.5
Foot: 245 mm Shoe: 255 mm 8.5  40 
Foot: 249 mm Shoe: 259 mm 7.5 6.5 40.5 
Foot: 253 mm Shoe: 263 mm 9.5  41.5 
Foot: 258 mm Shoe: 268 mm 8.5 10  7.5 42 
Foot: 263 mm Shoe: 272 mm 10.5  42.5 
Foot: 267 mm Shoe: 276 mm 9.5 11  8.5 43.5 
Foot: 271 mm Shoe: 280 mm 10  11.5  44 
Foot: 275 mm Shoe: 285 mm 10.5 12  9.5  44.5 
Foot: 279 mm Shoe: 289 mm 11  12.5  10  45 
Foot: 283 mm Shoe: 293 mm 11.5 13  10.5 46 
Foot: 287 mm Shoe: 297 mm 12    11  46.5 
Foot: 291 mm Shoe: 301 mm 12.5   11.5 47 
Foot: 295 mm Shoe: 306 mm 13    12  48 
Foot: 304 mm Shoe: 310 mm 14    13  49 

Note: The "Foot" size represents the actual measurement of your foot. The "Shoe" size represents the internal length of the shoe, which is typically slightly larger than the foot size to ensure a comfortable fit.

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 1/4 length fulcrum.

Karhu US
Karhu US

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 US
Karhu US

FUSION

KARHU Fusion 4.0 Fall/Winter 2024

Guidance

Cushion

Propulsion

IKONI

KARHU Ikoni 3.0

Guidance

Cushion

Propulsion

MESTARI RUN

KARHU Mestari Run 1.0 fall/winter 2024

Guidance

Cushion

Propulsion

Customer Reviews

Based on 8 reviews
88%
(7)
13%
(1)
0%
(0)
0%
(0)
0%
(0)
n
neil mcclafferty
How would you describe the fit?:
Too small
Too big
Size purchased: 11
Usual size worn: 10.5
Great sneaker

My second pair. The first pair were the best sneaker I’ve ever owned and so far this pair is living up their predecessors!!!

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.

A
Andreas Gindele
Perfekt!

Sehr gute Qualität!
Farben sehen so aus wie auf den Bildern.
Größenangaben passen.

K
Knud Johannsen

Less support on Forefoot

L
Lennart Steigelmann
Geiles Teil

Super stylischer und bequemer Schuh.
Sehr viele positive Rückmeldung von Freunden erhalten.