Karhu  MEN'S FUSION 4.5  FOGGY DEW / ALLOY 

$120.00$160.00

F101019

Colour

Select size

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

Please select a size

Run type

Faster run

Surface

Road

Guidance

Neutral

Cushioning

Neutral

Weight

302g in size US10

Drop

6mm


The men's KARHU Fusion 4.5 Foggy Dew / Alloy delivers a plush yet responsive ride tailored for the neutral runner. This versatile daily trainer supports smooth heel-to-toe transitions and offers a cushioned, energetic underfoot feel to keep you moving effortlessly. A shoe made for tempo runs, training sessions, and workouts.


The shoe utilizes refined IdealKnit mesh for improved breathability and comfort, with added reflective details for improved visibility. A redesigned tongue that is softer, more accommodating, and offers a premium on-foot feel. The incorporation of nitrogen-injected AeroFoam in the midsole provides better rebound and a more cushioned experience for improved comfort during runs. The KARHU Fusion 4.5 is the ultimate all-in-one shoe for runners seeking a unique blend of comfort, responsiveness, and performance.


Details KARHU Fusion 4.5
- Shortened Fulcrum + Propulsion unit for an efficient stride.
- Nitrogen-infused AeroFoam midsole for improved comfort during runs.
- Updated IdealKnit mesh construction with improved breathability.
-Increased visibility with reflective prints
- M-Lock lacing construction ensures a secure midfoot.


The brand new men’s Fusion 4.5 is the latest version in our Fusion line-up. The shoe remains a plush and propulsive neutral trainer with a familiar streamlined fit that seamlessly accelerates the transition from heel to toe-off.


The latest adjustments to the shoe utilize refined IdealKnit mesh for improved breathability and comfort, with added reflective details for improved visibility. A redesigned tongue that is softer, more accommodating, and offers a premium on-foot feel. The incorporation of nitrogen-injected AeroFoam in the midsole provides better rebound and a more cushioned experience for improved comfort during runs.


The KARHU Fusion 4.5 is the ultimate all-in-one shoe for runners seeking a unique blend of comfort, responsiveness, and performance.


Technologies KARHU Fusion 4.5
- Fulcrum + Propulsion Unit
- IdealKnit
- 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!

US Men's Size UK Size EU Size Shoes Length (mm)
8 7 41.5 263 mm
8.5 7.5 42 268 mm
9 8 42.5 272 mm
9.5 8.5 43.5 276 mm
10 9 44 280 mm
10.5 9.5 44.5 285 mm
11 10 45 289 mm
11.5 10.5 46 293 mm
12 11 46.5 297 mm
12.5 11.5 47 301 mm
13 12 48 306 mm
14 13 49 310 mm
15 14 50 315 mm
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 US

Guidance

Cushion

Propulsion

IKONI

Karhu US

Guidance

Cushion

Propulsion

MESTARI RUN

Karhu US

Guidance

Cushion

Propulsion

Customer Reviews

Based on 24 reviews
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c
crhamblen (Hamilton, US)
How would you describe the fit?:
Too small
Too big
Size purchased: 10
Usual size worn: 10
Karhu Fusion 5.0 HiVo

I've owned some 5 Karhu running shoe's, including the Mestari 2.0. From there, brands such as Puma (Deviate Nitro 3), Adidas, New Balance, Saucony (Ride 17), Hoka (Mach 4) and finally, the LiNing Fiedan 6 Challenger Ultra (great shoe).

The bottom line is that supercritical foams have really helped with cushion and rebound (energy return) on running shoes these days.

When Fleet Feet said that the Karhu Fusion 5.0 might be the best Karhu running shoe, ever, and that the new foam is indeed a supercritical formulation, that piqued my interest enough to go buy a pair, for the HiVo variant, size 10 (true to size for me).

While shoe reviews are subjective, I can tell you that the Karhu Fusion 5.0, has way more cushion than the Mastari Run 2.0 that I have, with a very smooth transition, but also a bouncy/good energy return feel.

Traction is on par with Puma's Puma Grip, and never has a Karhu shoe that I've owned had this type of traction. Still, I wouldn't recommend trail running!

For race day, no, but for an every day trainer, I am convinced that Karhu Fusion 5.0, is the finest running shoe that Karhu has ever offered.

To put this in further context, I am 6', 235 lbs, and this foam doesn't bottom out. I can only imagine for lighter runners, that this foam in the Fusion 5.0, would be even better.

The only thing that I cannot speak to is longevity/durability. What I can say is that of every running shoe I've tried over the past 10 years, this is my favorite of all time. If future Karhu shoes improve even more than the Fusion 5.0, then people might just forget about their Adidas Evo SL shoes.

Regardless, Karhu finally has a shoe that can go toe to toe with any of the big players in the sunning shoe market, for a neutral daily trainer.

Keep up the good work, Karhu.

D
David Watson (Sarasota, US)
How would you describe the fit?:
Too small
Too big
Size purchased: 13
Usual size worn: 13

The most comfortable sneaker/sport shoe I have ever worn. I also feel excellent support without a heavy feel.

A
Andrew Burns (New York, US)
How would you describe the fit?:
Too small
Too big
Size purchased: 12
Usual size worn: 12
Excellent Running Shoe

This is my 3rd different model of Karhu running shoes g shoes. They are by far most comfortable and best performance. Great everyday running shoe !!

MEN'S FUSION 4.5 - FOGGY DEW / ALLOY

Size: