On Cloudmonster 3 Hyper vs Cloudmonster 3 Hyper LS: Two Very Different Super Trainers

Introduction

On now sells two versions of the Cloudmonster 3 Hyper: a standard model with a more traditional engineered mesh upper, and a Light Spray (LS) version with an innovative laceless upper. They share a name and a near-identical midsole, but on the run they are two very different propositions, and they make very different dents in your wallet. After test miles in both, here is how they compare and which one makes more sense to buy.

Quick Specs: Weight, Drop and Price

On does not publish stack heights for either shoe, but both come with the same 6mm drop. In a UK 8.5 / US 9, the standard Cloudmonster 3 Hyper weighs 9.1 oz (257g), while the LS is a lot lighter at 7.8 oz (218g), which is genuinely light for a super trainer.

Both are expensive. The Light Spray version sits at $280 / £270, and you pay a hefty premium for the fancy upper. The standard version lands at $220 / £210.

Midsole and Upper Construction

Both shoes use the same dual-foam setup: a full-length wedge of Helion HF PEBA foam on top of CloudTec EVA pods. Because the LS has no sockliner, On added around 3mm of extra PEBA to its midsole.

The big difference is up top. The LS features a laceless Light Spray upper, essentially a TPU thread applied by a robotic spray process that builds into a flexible, slightly stretchy one-piece bootie fit. There are no real heel collar or heel counter structures; it simply hugs the foot. The entry point is narrow, though, and the stretch is limited.

The standard model takes a more traditional route: a dense, thick engineered mesh upper with toe box overlays for structure, a generously padded heel collar, a heel counter, gusseted wrapping tongues and fine laces in a conventional setup. Outsoles are nearly identical on both, with rubber covering the key contact areas; the LS just has one extra section of rubber.

Fit and Sizing: Where the Two Shoes Split

Fit is the decisive difference here. The laceless LS upper is not adjustable in any way, so if it does not work for your foot out of the box, the standard model will fit far better. One tester with a high instep found the LS a real wrestle to get on, even half a size up, and it pinched across the midfoot at regular size. That tester recommends trying the LS on in a shop before buying, especially if you have high insteps or wide feet.

Another tester with narrow feet and low arches slipped into the LS easily and found it held the foot securely, describing the fit as an extension of the body. The same tester found the standard version’s fit solid, comfortable and well padded without being oppressive, with good toe box room. Both wore their usual size in each shoe.

The standard Cloudmonster 3 Hyper is also the better-looking crossover shoe of the two, easy to pair with regular clothes and pack in a suitcase alongside running duty.

Ride and Performance: Lively Versus Comfortable

Despite sharing DNA, these two shoes deliver very distinct rides. The LS is undeniably the livelier shoe: lighter, more racy in fit and feel, and much closer to a super shoe. The extra PEBA sitting directly under the foot, with no sockliner in between, creates a springier, more energetic ride, while the CloudTec layer adds stability underneath. It suits fast efforts, tempo and steady paces in particular, encouraging quick foot turnover with a snappy but smooth character. It also holds up fine on easy runs and is impressively stable for such a high-stack, lightweight shoe, making it one of the most versatile super trainers on the market. It is not, however, the most propulsive option for all-out speed compared with plated shoes.

The standard version feels more like a classic daily trainer. It is heavier and more built-up, you feel the CloudTec layer more, heel-to-toe transitions are less smooth, and it lacks big energy off the forefoot. Where it shines is comfort: supportive cruising from easy paces up to just below tempo, with good leg protection that felt great on tired post-marathon legs. But at this price and billing, it does not fully deliver a true super trainer experience.

Test mileage included roughly 75km in the LS and 60km in the standard shoe, across easy runs, intervals, progressions, tempo work and runs up to around 90 minutes.

Verdict: Which One Should You Buy

If you are choosing between only these two shoes, the LS is the better all-around shoe. It handles easy runs just as well as the standard version, then adds a whole extra range of performance at tempo and workout paces, in a package that is significantly lighter and more energetic. It ranks among the standout super trainers available, alongside shoes like the Kiprun and other top-tier tempo trainers. It is worth the extra investment if the upper works for your foot.

The standard Cloudmonster 3 Hyper is easier to live with: a comfortable, supportive cruiser with a fit you can control and genuine crossover style. But it feels more like a solid daily trainer priced like a super trainer, and there are better-value options in the wider market. If the LS upper fits you, the Light Spray version is the one to get.

Conclusion

The Cloudmonster 3 Hyper LS is the more special shoe: lighter, livelier and far more versatile, provided the laceless upper suits your foot, so try before you buy if you can. The standard Cloudmonster 3 Hyper remains a comfortable, well-made daily cruiser that lacks the firepower its price suggests. Choose the LS for performance, the standard version for fit and everyday ease.