Karhu Fusion 4.0 Review
In the Karhu lineup, the Fusion is positioned as a propulsive option. But can the Fusion 4.0 live up to its energetic reputation?
KARHU Fusion 4.0
Features
Stylish and propulsive, you will be excited to lace up the Karhu Fusion 4.0.
Get ready for quick, cushioned runs, this shoe is streamlined to work whether you are running long distance or kicking it up a notch with some tempo work. Our testers loved the smooth and snappy feel of their runs in our Karhu Fusion 4.0 review. Plus, with its new knit upper, it looks great for casual wear as well.
Details:
- Upper: The stylish Ideal Knit upper feels as good as it looks with a snug, streamlined fit. Featuring Karhu’s signature M-lock midfoot fit, you will feel secure as you rock your runs.
- Midsole: The nitrogen-infused AeroFoam cushioning is responsive and snappy and when combined with Karhu’s Fulcrum technology, creates a swift and efficient underfoot feel.
Tech Specs
KARHU Fusion 4.0
| Weight |
10.0 (Men’s size 10), 7.9 oz (Women’s size 8)
|
|---|---|
| Heel-to-toe drop |
6 mm
|
| Stack height (heel/forefoot) |
28 mm / 22mm
|
| Surface |
Road
|
| Ride | 2/5 on the Firm to Plush Scale |
| Cushioning | 3/5 on the Minimum to Maximum Scale |
| Energy | 3/5 on the Relaxed to Propulsive Scale |
| Category | neutral |
What’s New
Karhu updated the Fusion 4.0 with a new look and feel. A brand new Ideal Knit upper gives you plenty of style, while still fitting and feeling great during the run. Karhu revamped the midsole with the nitrogen-infused AeroFoam cushioning to give you a plush and propulsive ride.
Who It’s Best For
The Karhu Fusion 4.0 is a snappy and propulsive neutral ride that’s ideal for those with a high, rigid arch and performs well whether you are doing long runs or tempo workouts.
Why You’ll Love It
You will love how efficient and propulsive running feels in the Karhu Fusion 4.0.
Star Rating is 5 / 5
The best running shoes for me
These shoes work great for me! Great cushion, and very comfortable. The sizing is a full size to a full size and a half bigger than my every day shoe. This is my third pair of Karhu Fusion.
Star Rating is 5 / 5
Walking shoes
This is my third pair of Karhu’s. Comfortable for my narrow feet. I have tried many brands and these are by far the best.
Star Rating is 4 / 5
Great shoe Love the comfort
I have a newer model the Karhu Fusion 4.5 which I like better but this was on sale and I do like it, just not the laces.
Star Rating is 4 / 5
Didn’t fit like my others
Same style, same “edition/model/year”, but these didn’t fit right. I donated them to charity. Karhu is a great brand- someone will be thrilled!
Star Rating is 3 / 5
Karhu Fusion
The laces don't stay tied which causes the shoes to become loose. Double knotting the laces still does not prevent the laces from loosening and becoming untied. Yes, I could purchase new laces, but at $170 for the shoes, I shouldn't have to.
Star Rating is 5 / 5
Tennis shoe
Comfortable! Wide toe box.. Thx to store sales clerk who helped me find shoe online and ordered.
Star Rating is 5 / 5
Perfect shoes that I keep coming back to!
This is the 8th pair of Fusions I have bought over the years. Truly the best shoe for someone with stability issues and a high foot. Won’t be my last pair!
Star Rating is 5 / 5
KARHU FUSION 4.0
This is a great high impact running shoe. Very comfortable and worth the investment.
Star Rating is 5 / 5
I love Karhu shoes!
The Karhu Fusion is my "go to" walking shoe. They are super comfortable, supportive, and hold up well.