The Brooks Glycerin Flex and On Cloudmonster 3 Hyper are both neutral road running shoes with maximum cushioning. The Glycerin Flex costs about $50 less (from $170).
Specs side by side
| Spec | Glycerin Flex | Cloudmonster 3 Hyper |
|---|---|---|
| Price | $170 | $220 |
| Rating | 4.4 / 5 (497 reviews) | — |
| Weight | 9.1 oz | 8.9 oz |
| Heel-to-toe drop | 6 mm | 6 mm |
| Cushioning | Max | Max |
| Support | Neutral | Neutral |
| Surface | Road | Road |
| Available for | Men & Women | Men & Women |
Specs and prices from Brooks and On, checked 2026-10-11. Weight is usually for a men's size 9–10.
Which should you get?
Get the Glycerin Flex if…
- you want to spend less
Get the Cloudmonster 3 Hyper if…
- it fits you better or you like its colors
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