These are On’s two most popular daily trainers, and they’re the pair most runners agonize over. Both are cushioned, both are great — but they ride very differently. After running in both, here’s the honest breakdown to help you pick.
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New to the brand? Start with our complete On running shoes guide for the full lineup.
Quick verdict
- Buy the Cloudmonster if you want maximum cushion, a bouncy and fun ride, and a shoe with personality for easy and daily miles.
- Buy the Cloudsurfer if you want a smoother, more rolling, versatile daily trainer that feels modern and natural.
If you mostly run easy and love a soft, energetic ride → Cloudmonster. If you want one do-it-all shoe that flows from easy to moderate paces → Cloudsurfer.
Head-to-head comparison
| Spec | Cloudmonster | Cloudsurfer |
|---|---|---|
| Ride | Bouncy, plush, fun | Smooth, rolling, natural |
| Cushion | Maximum (big CloudTec) | Soft (CloudTec Phase) |
| Tech | Helion + Speedboard | CloudTec Phase (sequential collapse) |
| Weight | Heavier | Slightly lighter |
| Best for | Easy days, max-cushion lovers | Versatile daily, smooth riders |
| Pace range | Easy to moderate | Easy to moderate-fast |
The ride: where they really differ
The Cloudmonster is all about that big, soft, bouncy sensation. The oversized CloudTec pods and chunky Helion midsole give it a playful, protective feel — it’s the shoe that makes easy days feel cushy and fun. The trade-off is weight and a slightly less “connected” feel at faster paces.
The Cloudsurfer was redesigned around CloudTec Phase, where the pods collapse front-to-back in sequence. The result is a smooth, rolling ride that feels more natural and versatile. It transitions better and handles a wider range of paces, but it doesn’t have the Cloudmonster’s plush “wow” factor on easy days.
Which fits your training?
- High-mileage easy runner / heavier runner: Cloudmonster — the extra cushion protects tired legs (pair with good injury-prevention habits).
- One-shoe runner who mixes paces: Cloudsurfer — more versatile across easy and moderate efforts.
- Marathon trainer: either works for easy days, but see best On shoes for marathon training for the full rotation.
Fit and sizing (both)
Both run slightly narrow and a touch long — typical for On. Many runners size up half a size, especially with wider feet. Try them on if you can.
Durability and value
Both should give you 500+ miles of training with normal use. Want proof of how the Cloudmonster holds up long term? I logged it all in my Cloudmonster review after 500 miles.
Bottom line
You won’t be unhappy with either. Pick the Cloudmonster for a fun, max-cushion easy-day shoe, or the Cloudsurfer for a smooth, versatile one-shoe daily trainer.
→ Check the Cloudmonster · Check the Cloudsurfer
Which one did you go with? Let me know in the comments.