On Cloudmonster 3 Hyper review
On’s plate-free super trainer, rebuilt with a full-length layer of Helion HF over a firmer CloudTec base: taller, lighter and livelier than the regular Cloudmonster 3.
- Drop
- 6 mm
- Heel stack
- 46 mm
- Forefoot
- 40 mm
- Weight
- 264 g
- Support
- Neutral
- Plate
- None
Our verdict
Tall, steady and finally lively.
The Cloudmonster 3 Hyper puts a full layer of PEBA-based Helion HF foam over a firmer CloudTec base, giving a tall, plate-free trainer with real rebound and a wide, planted platform. It suits neutral runners who log long, steady miles and some tempo work and like a firm, stable ride, less so those who want a soft trampoline or a racing shoe.
Strong points
- Much better energy return than earlier Cloudmonsters in RunRepeat’s lab
- Wide, stable platform: a stable neutral shoe for both Doctors of Running testers
- Smoother heel transition and rocker than the first Cloudmonster Hyper
- True to size for every lab and tester we read
- Durable build: 0.5 mm of outsole wear in RunRepeat’s abrasion test
Weak points
- Firm at first; the top foam needs a few runs to soften
- Heavier than the lightest super trainers, about 264 g in a men’s US 9
- Feels blocky once the pace gets really fast
- Warm upper: breathability 2 out of 5 in RunRepeat’s test
- Standard width only
Who it fits
- You log long, steady miles
- You like a firm, stable max-stack shoe
- You want some tempo in your trainer
- You land on the outside of your heel
Who should skip it
- You want soft, bouncy cushioning
- You want a race-day shoe
- Your feet need extra width or toe height
- You dislike support under the arch
Shoe profile
Where the Cloudmonster 3 Hyper sits among the 395 shoes in our catalogue, and what changed from the Cloudmonster Hyper.
| Axis | Cloudmonster 3 Hyper | Cloudmonster Hyper | Change |
|---|---|---|---|
| Cushioning | 93 | 42 | +51 |
| Lightness | 50 | 48 | +2 |
| Stability | 30 | 30 | = |
| Drop | 20 | 20 | = |
| Response | 20 | 20 | = |
Fig. 1 · How to read it. Each axis runs from 0 at the centre to 100 at the edge. Cushioning, lightness and drop are the shoe’s rank in the catalogue from listed figures; stability and response are scored from the support type, the plate, the rocker and the intended use. The dotted grey line is the catalogue median. Source: Strideprint catalogue (cat).
Where it sits in the catalogue
Weight264 g, heavier than 50% of shoes
Drop6 mm, lower than 59% of shoes
Heel stack46 mm, higher than 93% of shoes
Forefoot stack40 mm, higher than 96% of shoes
How it feels
Written from 6 published tests. We quote measurements, not impressions we did not have.
Plenty of foam, firm at first. A full Helion HF layer over a firmer CloudTec base: protective and close to average softness in RunRepeat’s lab, firm until it breaks in.
Wide, centred and planted. Neutral but very steady: wide platform, sidewalls and a firm base. One tester felt the arch area at first.
Bounce at steady pace, bulk at speed. High energy return in RunRepeat’s lab, 66.1 percent at the heel and 69.4 at the forefoot, and a late rocker; bulky at very fast paces.
Plenty of foam, firm at first. The midsole stacks a full-length layer of Helion HF, On’s PEBA-based foam, over a firmer Helion base shaped with CloudTec elements. On says it carries 20 percent more foam than the previous Hyper. RunRepeat measured the foam at 37.2 on the Asker C scale, close to its lab average, and rates its shock absorption high.
The first runs feel firmer than the stack suggests. Doctors of Running say the Helion HF needs about 5 to 10 miles to break in, The Run Testers found it softened after a few runs, and Marathons.com noticed some firmness at impact early on.
Wide, centred and planted. This is a neutral shoe that behaves like a stable one. RunRepeat measured a 118.6 mm forefoot and 94.8 mm heel, both wider than on the regular Cloudmonster 3, and torsional rigidity of 17.0 Nm, above its lab average. Doctors of Running describe large sidewalls and a cradle that keeps the foot centred, and RTINGS credits the firmer lower layer for a steadier ride than the soft top suggests.
That structure has a flip side: one Doctors of Running reviewer felt the medial arch until it softened with wear.
Bounce at steady pace, bulk at speed. RunRepeat measured energy return of 66.1 percent at the heel and 69.4 percent at the forefoot, above its lab average and the main change from older Cloudmonsters. RTINGS found the forefoot livelier than the heel. There is no plate; a late forefoot rocker gives the toe-off its snap once the foam compresses, according to Doctors of Running.
Push towards interval pace and the 264 g shows. RTINGS and The Run Testers both find it bulky for fast running.
Read more
Plenty of foam, firm at first. The midsole stacks a full-length layer of Helion HF, On’s PEBA-based foam, over a firmer Helion base shaped with CloudTec elements. On says it carries 20 percent more foam than the previous Hyper. RunRepeat measured the foam at 37.2 on the Asker C scale, close to its lab average, and rates its shock absorption high.
The first runs feel firmer than the stack suggests. Doctors of Running say the Helion HF needs about 5 to 10 miles to break in, The Run Testers found it softened after a few runs, and Marathons.com noticed some firmness at impact early on.
Wide, centred and planted. This is a neutral shoe that behaves like a stable one. RunRepeat measured a 118.6 mm forefoot and 94.8 mm heel, both wider than on the regular Cloudmonster 3, and torsional rigidity of 17.0 Nm, above its lab average. Doctors of Running describe large sidewalls and a cradle that keeps the foot centred, and RTINGS credits the firmer lower layer for a steadier ride than the soft top suggests.
That structure has a flip side: one Doctors of Running reviewer felt the medial arch until it softened with wear.
Bounce at steady pace, bulk at speed. RunRepeat measured energy return of 66.1 percent at the heel and 69.4 percent at the forefoot, above its lab average and the main change from older Cloudmonsters. RTINGS found the forefoot livelier than the heel. There is no plate; a late forefoot rocker gives the toe-off its snap once the foam compresses, according to Doctors of Running.
Push towards interval pace and the 264 g shows. RTINGS and The Run Testers both find it bulky for fast running.
Which runs it’s for
| Run | Fit | Why | Source |
|---|---|---|---|
| Long runs | Made for it | Its main job, according to On, RTINGS and Doctors of Running. | Doctors of Running, RTINGS, On |
| Easy runs | Made for it | RTINGS gives it its best score as a daily trainer. | RTINGS, Marathons.com |
| Tempo | Can do | RunRepeat rates it well for tempo and one Doctors of Running reviewer agrees; The Run Testers find it blocky when pushed. | RunRepeat, Doctors of Running, The Run Testers |
| Recovery runs | Made for it | Protective enough for slow days; RTINGS and Marathons.com both place it there. | RTINGS, Marathons.com |
| Marathon race | Can do | Fine for marathon training blocks. As a racer, RTINGS finds it too heavy and unplated. | RTINGS |
| Intervals | Not for it | Weight and bulk work against it at very fast paces. | The Run Testers, Marathons.com |
| Walking | Made for it | Doctors of Running tick it as good for walking and standing. | Doctors of Running |
Source: Doctors of Running, RTINGS, On, Marathons.com, RunRepeat, The Run Testers
What the tests say
Published reviews agree the Cloudmonster 3 Hyper is a big step up from the first Hyper: more rebound, a smoother roll and a stable platform for long, steady miles. They differ on how firm it feels and how fast it can go.
| Test | Type | Our reading | In one sentence | Source |
|---|---|---|---|---|
| RunRepeat | Lab | Positive | RunRepeat scores it 90 out of 100 and calls it On’s best super trainer to date, held back only by a firm feel and slightly higher weight than rivals. | Read |
| Doctors of Running | Review | Positive | Both Doctors of Running reviewers give A minus for performance: a stable, responsive maximal trainer that improves clearly on the first Hyper. | Read |
| RTINGS | Lab | Mixed | RTINGS gives 7.5 out of 10: very protective and stable for training and long runs, too heavy and unplated to race. | Read |
| The Run Testers | Review | Mixed | The Run Testers call it an accomplished cruiser for steady and daily miles, but short on energy and versatility at its level. | Read |
| Marathons.com | Review | Positive | Marathons.com sees a comfortable, stable and lively partner for long runs and controlled faster efforts, firm for the first few runs. | Read |
They agree
- Better than the first HyperRunRepeat, Doctors of Running and The Run Testers all prefer it to the original Cloudmonster Hyper, citing more rebound, a smoother heel and a better-balanced ride.
- Stable for its heightRunRepeat, RTINGS and Doctors of Running all describe a wide, planted base that keeps the foot centred, helped by the firmer lower layer.
- True to sizeRunRepeat, RTINGS, Doctors of Running and The Run Testers all found the length right in the usual size.
- A trainer, not a racerRTINGS, The Run Testers and Marathons.com all keep it away from the fastest sessions because of its weight and bulk.
They split
- How lively it isRunRepeat calls it On’s best super trainer so far and measured high energy return. The Run Testers find it a comfortable cruiser without big energy, and less snappy than the first Hyper.
- How fast it can goRunRepeat scores tempo highest and Marathons.com used it for controlled threshold work. RTINGS and The Run Testers find it too heavy and blocky for quick running.
- Toe roomDoctors of Running and The Run Testers found generous forefoot volume. RTINGS rates forefoot height lower, and RunRepeat measured a toe box of average width.
How it’s built
An engineered mesh upper with a padded heel sits on a dual-density, plate-free midsole: a full-length Helion HF top layer over a firmer Helion base with CloudTec elements, and wide rubber coverage underneath.
Structured mesh upper and plush heel on a plate-free midsole: full Helion HF over a firmer CloudTec base, with a durable 3.2 mm rubber outsole.
| # | Part | Measure |
|---|---|---|
| 1 | UpperEngineered mesh | Breathability 2 / 5 |
| 2 | Tongue | 2.9 mm |
| 3 | Heel | Stiffness 4 / 5 |
| 4 | MidsoleHelion HF over Helion with CloudTec | Hardness 37.2 AC |
| 5 | Insole | 3.9 mm |
| 6 | Outsole | 3.2 mm |
Fig. 3 · Side profile. Stack heights to scale (listed: 46 mm heel, 40 mm forefoot; measured: 3.2 mm outsole); the split between the two foams is not measured and is drawn at mid-height. Dashed: insole, hidden. Sources: Running Warehouse, RunRepeat, Doctors of Running, The Run Testers, Marathons.com, On.
Upper. A denser, more structured mesh than the first Hyper, according to The Run Testers. RunRepeat rated breathability 2 out of 5, better suited to cool seasons than hot summer days, though Doctors of Running found it breathable on their runs.
Tongue. Semi-gusseted and thin: RunRepeat measured 2.9 mm of padding against 5.3 mm on the regular Cloudmonster 3, and both Doctors of Running reviewers would like a little more.
Heel. A stiff counter, 4 out of 5 in RunRepeat’s test, wrapped in plush padding that sits low enough to stay off the Achilles tendon for a Doctors of Running reviewer. The heel flares wide with a pronounced bevel.
Midsole. A full-length Helion HF top layer, a PEBA-based foam, over a firmer Helion base with CloudTec elements. RunRepeat measured 37.2 AC. Unlike the regular Cloudmonster 3, there is no triple-layer CloudTec and no Speedboard.
Insole. Removable and 3.9 mm thick in RunRepeat’s measurement, slightly thinner than average. Doctors of Running do not rate it as orthotic friendly.
Outsole. Ten pods around a wide central channel with generous rubber coverage, 3.2 mm thick. RunRepeat measured 0.50 for wet traction, close to its average, and Doctors of Running found grip good on dry and wet roads but would avoid trails, where stones get trapped.
Read more
An engineered mesh upper with a padded heel sits on a dual-density, plate-free midsole: a full-length Helion HF top layer over a firmer Helion base with CloudTec elements, and wide rubber coverage underneath.
1. Upper. A denser, more structured mesh than the first Hyper, according to The Run Testers. RunRepeat rated breathability 2 out of 5, better suited to cool seasons than hot summer days, though Doctors of Running found it breathable on their runs.
2. Tongue. Semi-gusseted and thin: RunRepeat measured 2.9 mm of padding against 5.3 mm on the regular Cloudmonster 3, and both Doctors of Running reviewers would like a little more.
3. Heel. A stiff counter, 4 out of 5 in RunRepeat’s test, wrapped in plush padding that sits low enough to stay off the Achilles tendon for a Doctors of Running reviewer. The heel flares wide with a pronounced bevel.
4. Midsole. A full-length Helion HF top layer, a PEBA-based foam, over a firmer Helion base with CloudTec elements. RunRepeat measured 37.2 AC. Unlike the regular Cloudmonster 3, there is no triple-layer CloudTec and no Speedboard.
5. Insole. Removable and 3.9 mm thick in RunRepeat’s measurement, slightly thinner than average. Doctors of Running do not rate it as orthotic friendly.
6. Outsole. Ten pods around a wide central channel with generous rubber coverage, 3.2 mm thick. RunRepeat measured 0.50 for wet traction, close to its average, and Doctors of Running found grip good on dry and wet roads but would avoid trails, where stones get trapped.
Durability. A strong point. The outsole lost only 0.5 mm in RunRepeat’s abrasion test, against an average of 1.1 mm, the heel padding scored 5 out of 5 and the toe box 3 out of 5. A Doctors of Running reviewer saw only slight outsole wear after 40 miles.
Durability. A strong point. The outsole lost only 0.5 mm in RunRepeat’s abrasion test, against an average of 1.1 mm, the heel padding scored 5 out of 5 and the toe box 3 out of 5. A Doctors of Running reviewer saw only slight outsole wear after 40 miles.
Specs, listed and measured
Every figure carries its source.
Heel stack, mm
Forefoot stack, mm
Drop, mm
Weight (men’s), g
| Spec | Listed | Measured |
|---|---|---|
| Drop |
|
|
| Heel stack |
|
|
| Forefoot stack |
|
|
| Weight, US M9 |
|
|
| Support |
| – |
| Plate |
| – |
| Surface |
| – |
| Release year |
| – |
Fig. 4 · Listed vs measured. Bars start at zero. Sources: On, Running Warehouse, Doctors of Running, RunRepeat, RTINGS.
Lab measurements
| Spec | Measured |
|---|---|
| Midsole hardness |
|
| Energy return (heel) |
|
| Flex force |
|
| Torsional rigidity |
|
| Heel counter stiffness |
|
| Traction coefficient |
|
| Spec | Measured |
|---|---|
| Toe box width |
|
| Toe box height |
|
| Outsole thickness |
|
| Insole thickness |
|
| Tongue thickness |
|
Sizing and fit
Take your usual size; there is only one width, so wide feet and tall toes should try it first.
Length
True to size
Widths
standard
Toe room
Toe room is average in width and on the low side in height. RunRepeat measured 72.8 mm wide and 27.5 mm high, while RTINGS rates forefoot height lower than the rest of the fit.
RunRepeat, RTINGS
Full sizing notes from testers
RunRepeat, RTINGS, Doctors of Running and The Run Testers all found it true to size, and On lists a regular, true-to-size fit. One Doctors of Running reviewer notes it could feel slightly long without the thick heel padding, which locks the heel in well.
The upper is a structured engineered mesh with a lot of heel padding. RunRepeat measured a medium fit and a 72.8 mm toe box, average for its lab. The Run Testers and Doctors of Running found plenty of forefoot room, while RTINGS rates forefoot height lower, so tall toes may touch the top.
RunRepeat and RTINGS list a standard width only, and Running Warehouse shows D width only for men.
RunRepeat, Doctors of Running, RTINGS, The Run Testers, Running Warehouse, On
Vs Cloudmonster Hyper
On skipped a version 2: the 3 Hyper replaces the 2024 Cloudmonster Hyper with a full layer of Helion HF, more foam and a reworked heel, and reviewers find it livelier and smoother.
| Cloudmonster 3 Hyper | Cloudmonster Hyper | |
|---|---|---|
| Support | Neutral | Neutral |
| Drop | 6 mm | 6 mm |
| Heel stack | 46 mm | 37.5 mm |
| Forefoot | 40 mm | 31.5 mm |
| Weight | 264 g | 265 g |
Keep the first Cloudmonster Hyper if you liked its firmer, snappier and more immediate roll, which The Run Testers feel the new one trades away. Move to the 3 Hyper if the original felt blocky or dull, or if you want more cushioning for long runs.
Listed figures. Source: Strideprint catalogue (cat).
Version history: Cloudmonster Hyper to Cloudmonster 3 Hyper
Helion HF from heel to toe. Believe in the Run described the first Hyper’s PEBA foam as a partial insert inside a Helion carrier; RTINGS notes the new one has a full top layer of it. (RTINGS, Believe in the Run)
More foam, taller stack. On claims 20 percent more foam. Believe in the Run listed 37.5 mm at the heel for the first Hyper; Doctors of Running list 45 mm for the new one. (Doctors of Running, On, Believe in the Run)
A smoother heel. Doctors of Running found a rounder heel with a more pronounced bevel and a smoother transition than the original. (Doctors of Running)
More rebound. RunRepeat found the original lacked energy return and measured high rebound on the new one; Believe in the Run had found the first Hyper blocky and lacking fun. (RunRepeat, Believe in the Run)
Sizing back to normal. Believe in the Run advised half a size down on the first Hyper; testers now find the 3 Hyper true to size. (RunRepeat, RTINGS, Believe in the Run)
Alternatives compared
Each one fixes one thing the Cloudmonster 3 Hyper does not do.
| On Cloudmonster 3 Hyper |  On Cloudmonster 3 |  On LightSpray Cloudmonster 3 Hyper |  ASICS Superblast 3 |  Saucony Endorphin Azura | |
|---|---|---|---|---|---|
| Pick it for | This page | More stable | Lighter | Softer | Faster |
| Drop | 6 mm | 6 mm | 6 mm | 8 mm | 8 mm |
| Heel stack | 46 mm | 40 mm | 49 mm | 47 mm | 40 mm |
| Weight | 264 g | 295 g | 205 g | 238 g | 240 g |
| Support | Neutral | Neutral | Neutral | Neutral | Neutral |
Questions runners ask
Is the On Cloudmonster 3 Hyper true to size?
Yes. RunRepeat, RTINGS, Doctors of Running and The Run Testers all found the Cloudmonster 3 Hyper true to size, and On lists a regular fit. It comes in one width only, and RTINGS finds the toe area a little low, so runners with wide feet or tall toes should try it before committing.
What is the difference between the Cloudmonster 3 and the Cloudmonster 3 Hyper?
The Cloudmonster 3 Hyper swaps the regular shoe’s triple-layer CloudTec and Speedboard for a full Helion HF layer on a firmer base. RunRepeat measured it 37 g lighter, 264 g against 301 g, with a taller stack, a wider platform and higher energy return. RTINGS finds the regular version firmer and more stable.
Is the Cloudmonster 3 Hyper better than the original Cloudmonster Hyper?
Most reviewers think so. RunRepeat, Doctors of Running and The Run Testers prefer the new version for its full Helion HF layer, smoother heel and better rebound. The Run Testers note it is a little less snappy than the original, so fans of that firm, quick roll may still prefer the first Hyper.
Can you race a marathon in the Cloudmonster 3 Hyper?
You can, but it is built for training. RTINGS calls it a training shoe rather than a marathon racer because it has no plate and is heavy for racing, and On pitches it as a long-run trainer. It is a strong choice for the long runs of a marathon block, with a lighter plated shoe for race day.
Is the Cloudmonster 3 Hyper stable?
For a neutral shoe, yes. Both Doctors of Running reviewers call it a stable neutral shoe thanks to its wide base and sidewalls, and RunRepeat measured a wider platform than the regular Cloudmonster 3. RunRepeat says it can work for a mild inward roll; it is not a stability shoe, and no shoe is a treatment.
How heavy is the Cloudmonster 3 Hyper?
About 264 g in a men’s US 9: Running Warehouse lists that figure, and RunRepeat and RTINGS both weighed 264 g. That places it 104th lightest of the 170 neutral road shoes weighed in that size in our catalogue, light for its stack but heavier than the lightest super trainers.
Does the Cloudmonster 3 Hyper need breaking in?
A little. Doctors of Running say the Helion HF foam needs about 5 to 10 miles to soften, The Run Testers found it softer after a few runs, and Marathons.com noticed a firm feel early on. Expect the first runs to feel firmer than the stack height suggests.
Sources
- RunRepeat, On Cloudmonster 3 Hyper lab review (Carlos Sánchez, March 2026). Accessed Oct 13, 2026.
- Doctors of Running, On Cloudmonster 3 Hyper Review (David Salas, Matt Klein, February 2026). Accessed Oct 13, 2026.
- RTINGS, On Cloudmonster 3 Hyper running shoe review (April 2026, updated July 2026). Accessed Oct 13, 2026.
- The Run Testers, On Cloudmonster 3 Hyper review. Accessed Oct 13, 2026.
- Marathons.com, Review and field test of the On Cloudmonster 3 Hyper (Emma Bert, March 2026, updated September 2026). Accessed Oct 13, 2026.
- Running Warehouse, On Cloudmonster 3 Hyper Men’s Shoes. Accessed Oct 13, 2026.
- On, On unveils the next generation of the Cloudmonster collection (press release, 2026). Accessed Oct 13, 2026.
- Believe in the Run, On Cloudmonster Hyper Review (April 2024, previous model). Accessed Oct 13, 2026.
- Strideprint, Strideprint running shoe catalogue (ranks computed on 2026-10-13). Accessed Oct 13, 2026.
- on.com · Drop, Support, Plate, and Release year, listed
- cat: Strideprint catalogue, 395 shoes
How we review. We read published tests, brand and retailer pages and lab measurements, cross-check the figures and flag where they disagree. We did not test this shoe ourselves. Last updated October 13, 2026.