On in Europe: The Current Line-Up, Model by Model

Four names carry the whole range. CloudTec is the original hollow-pod midsole that gives On shoes their look and their sensation of compressing on landing. CloudTec Sphere is the 2026 evolution, replacing hollow pods with channels cut through the forefoot, midfoot and outsole so the foam can deform sideways as well as vertically. Helion is the standard midsole compound, and Helion HF is the PEBA-based version — softer, livelier and used in the shoes that matter. The Speedboard is On's plate, curved and made of carbon in the racing models. LightSpray is the outlier: a seamless, laceless upper sprayed on by a robot arm in around three minutes, roughly 50 grams lighter than conventional materials and deliberately porous for thermal regulation.

Both launched on 30 July 2026 across On's own channels and European stockists, and they share everything except the upper. The On Cloudboom Strike 2 weighs around 191 g with a 40 mm heel, a 35 mm forefoot and a 5 mm drop, built on a Helion HF midsole that On states is about 15 per cent lighter than the original Cloudboom Strike compound, with CloudTec Sphere channels and a lighter, stiffer curved carbon Speedboard. The LightSpray Cloudboom Strike 2 swaps the mesh for the sprayed one-piece upper and drops to roughly 158 g, putting it among the lightest super shoes on any European shop wall. The catch with the LightSpray version is that there are no laces, so the fit is pass or fail.

The On Cloudmonster 3 Hyper arrived in March 2026 and is the most important shoe in this line-up. Lab testing measured a 43.4 mm heel and a 34.2 mm forefoot — both far above On's stated figures of 37 mm and 31 mm — at roughly 264 g, with a measured drop of 9.2 mm against a claimed 6 mm. The number that matters is energy return: 66.1 per cent at the heel and 69.4 per cent at the forefoot, well clear of the category average, delivered by a PEBA-based Helion HF top layer over a second foam. On's training shoes had historically measured poorly here, including the earlier Cloudmonster Hyper, so this is a genuine correction. It runs warm, it is stiff, and the rear geometry rolls aggressively — but the durability data is strong and it handles a wide range of paces.

The standard On Cloudmonster 3 is the cheaper, three-layer CloudTec version of the Hyper, measured at roughly 301 g with a 38.6 mm heel and a 6.4 mm drop, and it is the only shoe here offered in narrow, normal and wide. The On Cloudsurfer 2 is the softer, more flexible option, with a 37.5 mm heel, a 27.1 mm forefoot and the distinctive CloudTec Phase geometry — measured as considerably more bendable than average, and light for its stack, though it lacks guidance for pronators and has no gusseted tongue. The On Cloudswift 4 is the firmest of the three: a 32.7 mm heel, a broad 93.8 mm heel platform, an excellent ventilated knit upper and a very flexible build, but a harsh ride on long runs and a tight toebox.

The On Cloudsurfer Next is the tempo option, at roughly 264 g on a narrow 111.6 mm platform with energy return measured at 56.0 per cent in the heel and 56.7 per cent in the forefoot — respectable rather than exciting, and clearly aimed at runners who want a firm, connected feel at pace. For stability, the On Cloudrunner 3 and the Cloudflyer 5 provide mild guidance on a supportive platform without a medial post, which suits runners whose feet collapse slightly rather than dramatically. The Cloudflow 5 covers faster training sessions between those two groups. None of these are the standouts of the range, and all of them sit in a crowded part of the European market where ASICS, Saucony and Puma compete hard on value.

On's trail line has grown quickly and the top of it is genuinely competitive. The On Cloudultra Pro is described as the brand's most complete trail shoe, pairing the race-day Helion HF midsole with a nylon plate and a Missiongrip outsole for long off-road efforts. The On Cloudsurfer Trail 2 keeps the smooth, cushioned road feel and adds stability through a slightly firmer Helion CloudTec Phase midsole, which makes it the right shoe for mixed surfaces — park paths, gravel, light trail and casual hiking rather than technical mountain running. The Cloudvista sits below both as the lighter, simpler off-road option. In Europe, where most trail running happens on forest tracks rather than alpine ridges, the Cloudsurfer Trail 2 is the more useful buy for most people.

Buy the On Cloudmonster 3 Hyper if you want one expensive shoe to carry most of your week — it is the best-value item in this range despite a high price, because the lab numbers finally justify it. Buy the On Cloudboom Strike 2 if you race on the road, and try the LightSpray version in person before committing to a laceless upper. Buy the Cloudsurfer Trail 2 for European forest trails. Skip the Cloudswift 4 unless you specifically want a firm, flexible shoe, because most runners find it harsh past an hour. Skip the standard Cloudmonster 3 if the Hyper is within reach. And be aware that On's stated stack and drop figures diverge meaningfully from independent measurement across the range.