On Cloudmonster 3 — Spec Analysis (Not Yet Tested)

Spec analysis — not yet tested

The Cloudmonster is On’s biggest cushioned shoe and the one patients ask about after seeing it on everyone at the airport. The 3 launched in March 2026 with a firmer, more rockered ride than the 2. On publishes almost no numbers, so most of this page’s figures come from a named reviewer — read the source column. Here is what a foot and ankle surgeon makes of it.

What On says the Cloudmonster 3 is

On describes the Cloudmonster 3 as its maximum-cushion daily trainer, built on a “triple-layer CloudTec® cushioning system” of dual-density “Helion™ foam” with On’s “Speedboard®” plate for propulsion, under a polyester-mesh upper with a gusseted, padded tongue. On’s press release for the March 5, 2026 launch positions the 3 as bringing back “the rocker and responsiveness” of the original. On does not publish weight, stack or drop on its product page. It is sold at $190; a wide (2E) version exists for men only.

Manufacturer specifications

Source column tells you where each figure comes from. “On” means the brand’s own US product page. A retailer name means the brand does not publish that figure and a retailer does. “Not published” means nobody reliable does — those are the figures our bench measures first.

Specification	Figure	Source
Category	Maximum cushion, neutral daily trainer	On
Cushioning / plate	Triple-layer CloudTec®, dual-density Helion™ foam, Speedboard®	On
Weight, men's	Not published by On. 10.4 oz / 295 g at size 9	Doctors of Running (reviewer)
Weight, women's	Not published by On. 8.5 oz / 240 g at size 8	Doctors of Running (reviewer)
Heel stack	Not published by On. 35 mm	Doctors of Running (reviewer)
Forefoot stack	Not published by On. 29 mm	Doctors of Running (reviewer)
Drop	Not published by On. 6 mm	Doctors of Running (reviewer)
Midsole	Helion™ foam in a triple-layer CloudTec® configuration	On
Outsole	Rubber pads on the Cloud elements	Fleet Feet (retailer)
Upper	Polyester mesh, gusseted padded tongue	On
Widths, men's	D, 2E (wide)	Fleet Feet (retailer)
Widths, women's	D only	Fleet Feet (retailer)
Removable insole	Not published	—
APMA Seal of Acceptance	Not claimed	On
List price	$190	On

Figures checked September 7, 2026. Manufacturer pages: men’s · women’s.

What the spec sheet suggests — and what only a test can answer

On publishes the least of any brand on this site, and the Cloud elements are the reason we want it on the bench. The hollow “Clouds” under the sole compress individually, which On markets as the sensation of landing soft and pushing off firm. Clinically the question is what happens under a heel that strikes hard on the outside edge: hollow elements can collapse unevenly, and a shoe that is stable on paper can feel tippy on a supinated foot. That is a single-leg-stance and heel-counter question, and it is not on any spec sheet.

The rocker plus the Speedboard is a hallux rigidus combination. A plate that stiffens the forefoot and a rockered geometry both reduce how far the big-toe joint bends at push-off. On says the 3 brought the rocker back; if the sole is as stiff as the plate suggests, this is one of the more interesting shoes on this site for a stiff big toe — pending a flex test.

6 mm drop on a 35 mm heel, per Doctors of Running. Moderate for a heel-pain patient; lower than the 8–10 mm many prefer. On does not publish the figure.

Width is the practical limitation. A 2E exists for men only; women get one width. For a bunion or wide female forefoot, that alone rules it out until the toe-box measurement says otherwise.

What only the test can answer: every geometric number (On publishes none), lateral stability under a supinated heel strike, forefoot stiffness, toe-box dimensions, insole removability and orthotic volume around the Speedboard.

Who this shoe is probably for

Read from the published specification, not from wear. Treat these as hypotheses the test will confirm or overturn.

What changed from the previous version

Per On’s press release and Doctors of Running: the Cloudmonster 3 (March 5, 2026) gets a new mesh upper and a padded gusseted tongue (addressing the lace-bite complaint on the 2), and a new triple-layer CloudTec configuration that reviewers describe as firmer and more rockered than the Cloudmonster 2 — “bringing back the rocker and responsiveness of the 1”. On publishes no measured changelog.

Where to buy

Disclosure: the links below are paid links. If you buy through them Amazon pays us a commission at no cost to you. Commissions never influence a score, a ranking or the seal, and this page carries no score because the shoe has not been tested — see our independence policy.

Amazon listings are colourway-specific; the button opens one common colourway and you can switch colour and width there. Manufacturer list price $190 on September 7, 2026; prices move, check the listing. Also sold directly by On.

Questions people ask about the Cloudmonster 3

What is the On Cloudmonster 3 good for?

On positions it as its maximum-cushion neutral daily trainer for easy and long road miles. Read from the spec sheet, the two groups it suits best are neutral runners and walkers who want a rockered, highly cushioned shoe, and — pending a flex test — hallux rigidus patients, because a Speedboard plate plus a rocker reduces how far the big-toe joint has to bend at push-off.

What is the difference between the Cloudmonster 2 and the Cloudmonster 3?

Per On’s launch release and Doctors of Running: the 3 gets a new mesh upper with a padded, gusseted tongue (the lace-bite complaint on the 2) and a new triple-layer CloudTec configuration that reviewers describe as firmer and more rockered than the 2. If you liked the softer 2 it is a different ride; if you wanted the rocker back, the 3 is the one.

What are the differences between the Cloudmonster 1 and the Cloudmonster 3?

On says the 3 brings back the rocker and responsiveness of the original Cloudmonster after the softer 2, on a new triple-layer CloudTec layout with a padded gusseted tongue. On publishes no measured changelog, so the stack and drop comparison is a bench job.

Are Cloudmonster shoes worth it?

At $190 it is the most expensive shoe on this site with the least published data — On lists no weight, stack or drop, so the figures on this page come from a named reviewer. Worth it depends on whether the rocker and plate suit your foot: promising for a stiff big toe, less so for a supinated or unstable ankle on hollow Cloud elements, and women get one width only. We will not say either way until it has been measured and worn.

Is the On Cloudmonster 3 a stability shoe?

No. On positions it as a neutral maximum-cushion daily trainer; it has no stability system.

What is the drop of the Cloudmonster 3?

On does not publish it. Doctors of Running measured 6 mm on a 35 mm heel.

Does the Cloudmonster 3 come in wide?

For men, yes — a 2E is listed by retailers. For women, no.

What happens next

This model is in the queue for bench testing under Standard v1.0: weight on our scale at men’s US 10, heel and forefoot stack with calipers, internal toe-box width and depth, torsional rigidity, heel-counter stiffness and an Orthotic Volume Rating with a real orthotic inside it. If it goes on to wear testing, the nine-criterion scorecard and the seal decision follow. Every number will carry its own provenance label so you can see which figures we measured and which we are still quoting. If you own a pair and something on this page contradicts what is on your feet, tell us — corrections are logged.

Page type: spec analysis. Acquisition: not yet purchased. Last verified: September 7, 2026. Author: Tom Biernacki, DPM, FACFAS — board-certified foot and ankle surgeon, about.

Other shoes we have looked at

Drop is the figure that decides how load splits between your heel and your forefoot, so it is the fastest way to tell these apart. Where a figure was independently measured rather than taken from the brand, it says so — and on several of these the two disagree.