If you’ve been searching for On shoes for flat feet or overpronation, you’ve probably realised something quickly: On doesn’t have a huge stability range. But the shoes they do make are very clearly positioned.
Two models sit right at the centre of the conversation: the On Cloudrunner 3 and the On Cloudflyer 5.
Both are marketed as running shoes, but after testing them extensively, I’d argue they’re some of the best walking, standing-all-day, and daily use shoes On currently makes. If you have flat feet, mild to moderate overpronation, or simply want a more supportive On shoe, these are the models you’ll most likely end up choosing between.
Let’s walk through how they work, who they’re best for, and how to decide between them.
Reviewed & wear-tested; advice is educational, not a substitute for medical care.
Why stability shoes help with flat feet and overpronation
Before we talk about the shoes themselves, it’s worth quickly understanding what “stability” actually means.
When you walk or run, your foot naturally rolls inward to absorb shock. This is completely normal. However, in some people this inward movement happens more quickly or more excessively, which can increase strain on structures like the posterior tibial tendon, the plantar fascia, the peroneal tendons, and even the Achilles.
Modern stability shoes don’t try to block this motion completely. Instead, they slow and guide it using wider platforms, firmer foam, sidewalls and structured uppers. The goal is to help your foot feel supported and reduce fatigue, especially if you spend long hours walking or standing.
On uses this newer approach across both the Cloudrunner and Cloudflyer, which is why they feel very different from older, more traditional stability shoes.
On Cloudrunner 3 – On’s most versatile stability shoe
The Cloudrunner has always been one of On’s safest and most predictable shoes. The second version was comfortable and stable, but it felt quite flat and uninspiring underfoot. With the Cloudrunner 3, On quietly made a series of changes that transform how the shoe moves when you walk.
The drop has moved from 10 mm down to 8 mm, and the shoe is noticeably heavier. That extra weight comes from more cushioning and a larger platform underfoot, which becomes obvious as soon as you start walking.
What makes the Cloudrunner 3 stand out is how much smoother the transition feels compared to the previous version. The CloudTec pods now sit at a more diagonal angle, the heel bevel has been split and decoupled, and the forefoot rocker has become more aggressive. Together, these changes mean that when your heel hits the ground, you roll forward far more smoothly onto the forefoot instead of feeling stuck or flat.
The forefoot is now significantly stiffer as well, which provides more protection under the ball of the foot. That’s particularly helpful if you deal with forefoot sensitivity or big toe stiffness. The rocker helps compensate for the reduced flexibility, so walking still feels natural and fluid.
The upper is another big upgrade. Older On shoes often felt narrow, especially through the forefoot. The Cloudrunner 3 keeps the midfoot snug for lockdown but adds noticeably more room for the toes to splay. Combined with the wide platform and tall sidewalls, the shoe feels secure without feeling restrictive.
Overall, the Cloudrunner 3 feels like a modern, moderate stability shoe that excels at long walks, long days on your feet, and easy running. It’s not particularly bouncy or fast, but that predictability is exactly what many people with flat feet are looking for.
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On Cloudflyer 5 – On’s maximum stability option
If the Cloudrunner is moderate stability, the Cloudflyer 5 sits firmly in the maximum stability category.
This shoe feels more structured and more “orthopaedic” in the best sense of the word. Everything about its design prioritises control and support.
The midsole uses two different densities of foam, with a firmer compound under the heel and midfoot and a softer feel as you move toward the forefoot. This firmer foam runs in a J-shaped pattern, which helps resist inward rolling as your foot moves through stance.
The base of the shoe is also noticeably wider than your foot, thanks to a large amount of sole flare. This creates a very stable platform and helps keep your foot centred throughout the walking cycle.
Underfoot, the Cloudflyer feels firm and structured. If you prefer plush cushioning, it may feel too rigid. But if you want a shoe that feels supportive from the moment you step into it, the Cloudflyer delivers that immediately.
The 10 mm drop helps reduce strain on the Achilles, and the wide forefoot—available in extra wide—makes it particularly friendly for people with bunions or a naturally broader foot shape.
This is the shoe I’d lean toward if you have stronger overpronation, tendon-related issues, or simply want the most supportive On shoe available.
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Which On stability shoe should you choose?
For most people with flat feet, the Cloudrunner 3 will be the better starting point. It offers a smoother ride, better versatility and more comfort for longer distances. It feels modern and easy to wear daily.
The Cloudflyer 5 is more specialised. It’s firmer, more structured and more supportive, making it a better choice if you know you need a higher level of control or prefer a very stable platform underfoot.
Comparison table
| Shoe | Weight (Men’s US 9) | Drop | Stack Height | Support Level |
|---|---|---|---|---|
| On Cloudrunner 3 | ~311 g | 8 mm | Not officially listed (feels higher than v2) | Moderate stability |
| On Cloudflyer 5 | ~320 g | 10 mm | 31 mm heel / 21 mm forefoot | Maximum stability |
Final thoughts
Although both shoes are marketed as running shoes, they truly shine as walking and lifestyle stability shoes. If you spend long hours on your feet, travel frequently, or want a supportive everyday shoe, these models make a lot of sense.
For most people with flat feet or mild to moderate overpronation, the Cloudrunner 3 will feel like the perfect balance of comfort and support. If you want maximum structure and control, the Cloudflyer 5 is the shoe to consider.
Between the two, On now has a clear stability lineup—and it’s stronger than many people realise.
