Brooks Glycerin vs On Cloudmonster
Comparing the current Glycerin 23 and Cloudmonster 3. Specs are men's US 9.
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THE SHORT ANSWER
Drop is the real difference: 6 mm on the Cloudmonster 3 against 8 mm on the Glycerin 23. Coming off the Glycerin 23, the Cloudmonster 3 loads your calves and Achilles harder for the first couple of weeks. They are built for different jobs: the Glycerin 23 is a max cushion, the Cloudmonster 3 a daily trainer. The Glycerin 23 lists $15 lower.
- Brooks Glycerin 23Men'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 | Glycerin 23 | Cloudmonster 3 |
|---|---|---|
| FIT AND WEIGHT | ||
| Weight | 10.6 oz | 10.4 oz |
| Widths | D, 2E, 4E | D, 2E |
| Upper | Triple-jacquard warp knit | Re-engineered mesh with a padded tongue and an elastic lace keeper |
| CUSHIONING GEOMETRY | ||
| Heel stack | 38 mm | 35 mm |
| Forefoot stack | 30 mm | 29 mm |
| Drop | 8 mm | 6 mm |
| MATERIALS | ||
| Midsole | DNA Tuned supercritical foam | Dual-density Helion superfoam |
| Plate | None | Nylon-blend Speedboard, lowered away from the foot |
| VALUE | ||
| List price at launch | $175 | $190 |
Which line changes its ride more often?
The Glycerin has done it 2 times in 6 versions, most recently with the Glycerin 22 in 2025, and the Cloudmonster has done it once in 3 versions, most recently with the Cloudmonster 2 in 2024. If you want a shoe you can rebuy without reading a review first, the Cloudmonster has the steadier record.
Buy the Glycerin 23
Stocked at AmazonAvailability last checked Aug 3, 2026.
Buy the Cloudmonster 3
Stocked at AmazonAvailability last checked Aug 5, 2026.
Chasing a specific older version rather than choosing between the current two? The Brooks Glycerin lineage and the On Cloudmonster lineage track every version and what changed in each update.
Questions runners ask
- Is the Brooks Glycerin or the On Cloudmonster lighter?
- The Cloudmonster 3, by 0.2 oz in a men's US 9 (10.4 oz against 10.6 oz).
- Can I switch from the Brooks Glycerin to the On Cloudmonster?
- Yes, but ease into it. The drop moves 2 mm (8 mm on the Glycerin 23, 6 mm on the Cloudmonster 3), which changes where your foot loads at landing. Give it two weeks of easy running before a hard session.
- Which is more cushioned, the Brooks Glycerin or the On Cloudmonster?
- The Glycerin 23, on stack height: 38 mm under the heel against 35 mm. Stack is not the whole story, though; the foams differ too.
- Which comes in more widths?
- The Glycerin 23. The Glycerin 23 runs in D, 2E, 4E for men's sizes; the Cloudmonster 3 runs in D, 2E.
- Which costs more, the Brooks Glycerin or the On Cloudmonster?
- The Cloudmonster 3, by $15 at list ($175 against $190). That gap narrows once either one gets a successor.
Updated August 5, 2026.