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9.9 oz. (280 g) for a US M9, 8.5 oz. (240 g) for a US W7.5
33mm in heel, 27mm in forefoot (6mm drop)
Easy runs, daily training
AeroFoam Nova midsole, Critical foam insole, repositioned fulcrum, engineered mesh upper
Available now for $170
TINA: It feels embarrassing to admit I'm completely new to Karhu. As a runner, sometimes trying new things feels daunting, especially when you have a consistent lineup of shoes. The Karhu bear logo on the box intrigued me, though, and I learned the brand was founded over a hundred years ago, making its start with sports equipment before moving on to shoes that were eventually worn by Finnish athletes in the Olympics.
To say the brand has made a name for itself feels like an understatement, and so, Karhu, I apologize for not being aware of your game.
The Fusion 5.0 is a continuation of Karhu’s neutral shoe line-up focused on propulsion and comfort. The technology aims to keep the runner’s momentum going forward and to reduce the braking effect based on where the fulcrum lies in the sole. I often wonder how the ride of a shoe differs based on heel strike pattern and if, as a forefoot striker, the fulcrum would have its full effect. Between this and the thick-cushioned midsole, I was eager to put some miles in and see what Karhu had to offer.
TINA: For a daily trainer, the Fusion 5.0 covered the basics. The shoe itself is comfortable with a fully layered upper and cushioned arch support, which I appreciated. The insole felt tailored to my foot rather than a flat liner, adding to the comfort.
My 30 miles in the shoe covered a mix of terrain: most along the Baltimore waterfront with one 7-miler in Edinburgh, Scotland, from the city center with its cobblestones, up a dirt trail to the top of Arthur’s Seat. Surprisingly, the midsole fully maintained its height with only small amounts of wear visible on the tread. All in all, the shoe is kind of like a tank. It’s durable and sturdy, and nothing has changed from start to finish.
Aesthetically, the color scheme meshed well enough, and I liked the silver Karhu bear on the heel tab. For an 8.5 oz (240 g) shoe, it’s not the lightest shoe around, but the weight didn’t seem to factor into the performance.
TINA: Visually, the shoe takes up a lot of space, and the silhouette feels similar to a stability walking shoe with a thick foam midsole and rocker bottom. The pastel, white, and gray colorway didn’t excite me, but for a daily trainer, it works. As for wear, the shoe itself is easy to get into, but the upper is thick, with an equally cushioned tongue that takes away any breathability. The lockdown was a lot, maybe too much in the midfoot, to the point that it felt like I had to loosen the laces to feel comfortable.
The Fusion 5.0 is marketed to be propulsive, but the cushioning seemed to absorb all the impact with little to no return. The ride itself did not provide anything exciting, and I felt the shoe couldn’t keep up with any faster paces without my toes jamming into the front of the shoe. With that, I’m consistently a W9 in running shoes, and this one felt a little snug.
In regard to cost, the $170 price point feels too high for what is being offered. There are far too many options for daily trainers with the same offerings, plus more, that it would be hard for me to justify this shoe for that price.
TINA: As a first-time Karhu wearer, I was impressed by the comfort and structure of the Fusion 5.0. The step-in feel was consistent from the first wear to the last, and I appreciated the arch support and durability of the shoe. I would have liked more propulsion from the fulcrum technology but felt that was taken over by the plush midsole.
The Fusion 5.0 feels like a reliable shoe where you know exactly what you’re getting and each run will feel the same. Nothing flashy, but for a daily trainer that’s not necessarily a downfall. This may not be my first choice for hot, humid summer runs because of the limited breathability, but with the cooler weather, the extra insulation could be a bonus. If cost is less of a factor and you want to prioritize comfort over speed, this may be just the shoe for you.
You can pick up the Karhu Fusion 5.0 for $170 at Karhu by using the shop link below.
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Raised in Alaska, Tina grew up running on trails, beaches, mountains (and from bears, oh my!). As a travel physical therapist, some of her running shoes have outlasted her time in a city, but she finally calls Baltimore home. She enjoys baking sweet treats, but is best at tripping while running.
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