On Cloudmonster 2 vs Cloudmonster 3
Updated August 5, 2026. Specs are men's US 9.
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THE SHORT ANSWER
Whichever your size still exists in. The Cloudmonster 2 is discontinued at retail, so remaining pairs sell against a thinning size run, while the Cloudmonster 3 has a full one. The Cloudmonster 2 also lists $10 lower.
- On Cloudmonster 2Sizes running outMen's at AmazonWomen's
- On Cloudmonster 3Men's at AmazonWomen's
Availability last checked Aug 5, 2026. Prices and stock change without notice.
Every spec, side by side
| Spec | Cloudmonster 2 | Cloudmonster 3 |
|---|---|---|
| FIT AND WEIGHT | ||
| Weight | 10.4 oz | 10.4 oz |
| Widths | D | D, 2E |
| Upper | Engineered mesh, 92 percent recycled polyester, with a thin gusseted tongue | Re-engineered mesh with a padded tongue and an elastic lace keeper |
| The point of the update. Doctors of Running credits it with fixing a rough upper and a thin tongue that caused excruciating lace bite. Believe in the Run called the fit as comfortable as you will find in the market. | ||
| CUSHIONING GEOMETRY | ||
| Heel stack | 35 mm | 35 mm |
| Forefoot stack | 29 mm | 29 mm |
| Drop | 6 mm | 6 mm |
| MATERIALS | ||
| Midsole | Dual-density Helion superfoam | Dual-density Helion superfoam |
| Plate | Nylon-blend Speedboard, lowered away from the foot | Nylon-blend Speedboard, lowered away from the foot |
| VALUE | ||
| List price at launch | $180 | $190 |
| Up $10 to $189.95. Believe in the Run graded the value a C and named $160 to $180 rivals. | ||
| OTHER CHANGES | ||
| CloudTec geometry | Two layers of pods | Three layers of pods |
| On's headline change, and the reason the marketing claims more cushioning while the published stack sits still at 35 and 29 mm. RunRepeat measured 0.7 mm more under the heel and 0.9 mm more under the forefoot, so the third layer redistributes compression rather than adding height. | ||
| Last width | 98.5 mm at the widest point, 74.5 mm at the toebox | 94.3 mm at the widest point, 71.0 mm at the toebox |
| RunRepeat lab measurements rather than official specs. In a standard D the 3 is the narrower shoe, which is the likeliest reason On added a 2E to this line for the first time. Several reviewers described the 3 as roomier, so try it on rather than trusting either account. | ||
Weighing whether to switch at all, rather than which of these two to buy? What replaced the On Cloudmonster 2 covers the verdict on the update, what loyalists made of it, and the closest alternatives from other brands.
Buy the Cloudmonster 2
Sizes running outDiscontinued at retail. Amazon carries what remains, so treat an in-stock size as a closing window, and expect prices to swing.
Availability last checked Aug 5, 2026.
Buy the Cloudmonster 3
Stocked at AmazonAvailability last checked Aug 5, 2026.
Questions runners ask
- Which is lighter, the On Cloudmonster 2 or the Cloudmonster 3?
- Neither by a meaningful margin. Both weigh about 10.4 oz in a men's US 9.
- Did the price change between the On Cloudmonster 2 and the Cloudmonster 3?
- Yes. List price went up $10, from $180 to $190. Street prices differ: the older shoe usually sells under list once its successor ships.
- Do the On Cloudmonster 2 and Cloudmonster 3 come in the same widths?
- No. The On Cloudmonster 2 came in D; the Cloudmonster 3 runs in D, 2E. The Cloudmonster 3 added 2E.
- How do the stack heights compare?
- 35 mm heel and 29 mm forefoot on the On Cloudmonster 2, against 35 mm and 29 mm on the Cloudmonster 3. Same platform under both.
- Is the Cloudmonster 3 still the newest Cloudmonster?
- Yes. The Cloudmonster 3 is the current On Cloudmonster, listing at $190 at launch.