On Cloudmonster 3

On Cloudmonster 3 review: what runners say

Fit

Generous fit in the forefoot, stable and comfortable from the first wear. Sizing is inconsistent across On models: usual true-to-size confirmed by the Italian source, but at least one tester reports excess volume in both length and width.

Feel

Firm, structured ride — not soft or bouncy. The pronounced rocker aids transition; three-layer CloudTec cushions without softening the character of the Helion compound.

Durability

Hard rubber outsole covering the full contact area, extended to the lateral midfoot compared to the previous version. No definitive mileage data; testing conducted over approximately 150 km with no significant signs of wear.

Best for

Daily trainer for long distances and everyday training. Suited to runners who prefer a solid, controlled response; not recommended for those seeking soft cushioning or uptempo sessions.

Weak points

Price of $190 considered high for a daily trainer. Insufficient breathability, a limitation already present in the previous generation and left unaddressed. Non-negligible weight (295 g in M9).

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