KARHU Fusion

Men's Running Shoes View Women's
original price $150 sale/discounted price $112.50
Star Rating is 4.8 / 5
9 Verified Reviews
Raspberry / Strawberry #1127896-RSRW-ABIW
Happy Fit Guarantee
Fleet Feet Reviewed
Read our review of the KARHU Fusion


The Karhu Fusion delivers unbeatable cushion and fast transitions to your everyday runs.

Built on top of Karhu’s unique AeroFoam midsole, the Fusion is lightweight and more temperature resistant than shoes built with EVA midsole foam. Maximum cushioning in the forefoot creates super-soft landings while an added propulsion unit energizes take-offs.

A shortened, 3/4-length Fulcrum embedded in the midiole of the Fusion concentrates cushioning toward the heel and midfoot, creating a responsive rocker that stabilizes each step and pushes you forward.

The upper is constructed from Karhu’s super-breathable, lightweight Ideal Knit mesh that supports your foot on top of the midsole for an all-around comfortable fit.

Karhu also created a high-volume option for wider feet. The Fusion HiVo provides a wide width for runners who need a little more space.

Tech Specs

Karhu Fusion Ortix 2021


8.8 oz (W) 10.5 oz (M)


6 mm




Everyday training, racing



What's New

While the nuts and bolts of the Karhu Fusion Ortix 2021 are the same as previous versions, the new edition is lighter with a sleeker upper to shed ounces. The AeroFoam midsole is as cushy as ever, but the adjusted Fulcrum and propulsion unit create a faster transition in this version than the previous models.

Who It's For

The Fusion Ortix 2021 is a neutral shoe that packs a punch when it comes to cushioning. Whether you’re looking for something comfy to walk in or need a shoe that can absorb impact over long miles, the Fusion Oritx 2021 is for you.

Why You'll Love It

Great for everyday training or road races, the Fusion Ortix 2021 is a versatile shoe that provides plush cushioning and quick transitions.

Popular Men's Neutral Running Shoes


Star Rating is 4.8 / 5
Based on 9 Verified Reviews
Star Rating is 5 / 5

Great shoes!

Kelly 6 months ago Verified Purchase

My husbands swears by these shoes. Takes away all of his back pain.

Star Rating is 5 / 5

plantar fasciitis

Nickolas J 1 year ago Verified Purchase

My feet hurt so bad I did not even want to get out of bed to use the bathroom. My feet even hurt with the inserts I purchaed from my foot doctor. My salesperson at Fleet Feet did the analysis of my feet told me only one shoe would work for me and I was shocked! She had them in my size. She took my inserts installed them in these Kahu shoes and I put them on. She insisted I walk in them for 10 minutes outside the store. I did. Within those few minutes my feet stopped hurting. Yes I mean stopped hurting! Man I almost cried I was so happy. These are the shoes I have worn for the past year now. I can run in them play pickelball even dance with them on. I use my black Kahu's for dress. LOL. If your feet hurt you must try these shoes. You have 60 days to wear them and if they don't work you can return them with no questions asked. You owe it to yourself to try these amazing shoes.

Star Rating is 4 / 5

Mens Karhu

Robert G 2 years ago Verified Purchase

Solid product and it provides good stability and comfort for walking

Star Rating is 5 / 5


Thomas F 2 years ago Verified Purchase

Great fit & comfortable.

Star Rating is 4 / 5

My Karhu Fusion 2021 Running Shoes are Perfect!

Jeffrey T 2 years ago Verified Purchase

Expert service and my new Karhu Fusion 2021 running shoes have healed the osteomyelitis in my 2nd toe. After seeing a podiatrist for my foot problem I went to my local Fleet Feet shoe store for correct sizing. Fleet Feet's analysis showed my old shoes were all incorrect and that I needed a larger size. The wider toe box in the Karhu Fusion 2021 gave me the room that I needed; the larger size helped heal my toe infection. I wear them daily as I walk 5 miles in complete comfort on the hilly streets and walking trails nearby. My podiatrist has pronounced me completely healed and my exercise proceeds uninterrupted as a result. A special shout-out to my FF salesman Malcolm East former world class marathon runner here in Pittsburgh for his expertise is also made. Many thanks to Fleet Feet Sports for its invaluable service to me.

Star Rating is 5 / 5

Best support I’ve had in years

Steve L 3 years ago Verified Purchase

I have slight pronation in my left foot. The fusion has provided exceptional stability and arch support along with perfect arch height. Best shoes I have had in years. Thanks Karhu!!