Our verdict

The On Cloudmonster Hyper is a wonderful blend of the racer Cloudboom Echo 3 and the daily trainer Cloudmonster 2. We found that it boasts the responsive Helion HF foam and the weight savings of the former while adopting the CloudTec design and robust outsole of the latter—minus the Speedboard plate to enhance flexibility. Despite its premium price and some breathability issues, we think it’s a fantastic attempt by On at crafting its first supertrainer.

Pros

  • Roomy upper
  • Lighter than the Cloudmonster 2
  • High-quality materials
  • Well-balanced stack and stability
  • Comfortable for easy runs
  • Durable outsole
  • Wonderful lacing system

Cons

  • High price
  • Not the best for heel strikers
  • Needs more ventilation

Audience verdict

83
Good!

Who should buy

We’ve rigorously tested the Cloudmonster Hyper on the roads and in our lab, confirming it’s a major leap forward for the Cloudmonster series. We think it's:

  • Perfect for On fans seeking enhanced energy return and a lighter build in a maximalist trainer.
  • Ideal for forefoot and midfoot strikers looking for a cushioned yet agile shoe.
  • Worth the investment for those who prioritize top-quality materials in their trainers.

On Cloudmonster Hyper

Who should NOT buy

Supertrainers aren't cheap, but some options on the market offer comparable features to the Cloudmonster Hyper for less money. We recommend the Saucony Endorphin Speed 4 for those seeking a full-Pebax midsole, or the rockered New Balance FuelCell SuperComp Trainer v2 for a similar price advantage but featuring a plush ride.

We also believe that individuals with narrow to average feet won't like the Cloudmonster Hyper's roomy upper. In such cases, our recommendation is clear—the ASICS Superblast delivers a performance-oriented fit and a super-bouncy ride, all at a slightly lower price.

On Cloudmonster Hyper parts

Breathability

Upon unboxing the Cloudmonster Hyper, we immediately noted its lighter build compared to the Cloudmonster 2, though we quickly realized that the reduced weight wasn't due to the upper at all.

During our smoke-pumping test (3/5), the tongue showed decent ventilation, an important factor since the toebox seemed to trap smoke inside in our test, which could pose challenges during the hottest days of the year. However, in this white colorway, this should be less of a concern.

Using a light to examine the upper, we observed that On incorporated reinforcements and sidewalls to enhance stability, though these additions slightly compromised ventilation as well.

On Cloudmonster Hyper microscope

A closer inspection under the microscope revealed a mesh different from the non-Hyper Cloudmonsters, offering slightly improved ventilation compared to the v2—a welcome feature.

On Cloudmonster Hyper micro 2

Given On's reputation and the substantial $220 price tag, we expected a superb upper, and we're happy to report that this engineered mesh upper ranks among the best we've handled in the lab. We didn't find any manufacturing mistakes or quality control issues like we usually do with other brands.

It delivers a premium feel from heel to toe, and On claims that 85% of the upper is crafted from recycled materials, which is always a plus. Thus, our only suggestion for future versions would be to increase the ventilation further, so we can give it at least a 4/5 in this evaluation.

Test results
Cloudmonster Hyper 3
Average 3.8
Compared to 229 running shoes
Number of shoes
1
Breathability
5

Durability

Toebox durability

After completing our breathability assessments, we proceeded to evaluate the Hyper variant of the popular Cloudmonster for its durability.

Once the Dremel test concluded, we noted a partial tear, which we rated as 3/5—a slight decline from the Cloudmonster 2, yet still a good result. This outcome likely stems from the changes made to improve ventilation.

On Cloudmonster Hyper Toebox durability
Test results
Cloudmonster Hyper 3
Average 2.4
Compared to 163 running shoes
Number of shoes
1
Toebox durability
5

Heel padding durability

After destroying the toebox, we moved our rigorous testing to the Achilles area to provide a thorough lab analysis of the whole shoe.

Unfortunately, our findings were disheartening—the sandpaper tip of the Dremel severely damaged the heel for a 1 out of 5. This result is particularly concerning for those who experience frequent wear in this part of their running shoes.

On Cloudmonster Hyper Heel padding durability
Test results
Cloudmonster Hyper 1
Average 3.2
Compared to 159 running shoes
Number of shoes
1
Heel padding durability
5

Outsole hardness

Following mixed results, we next turned our attention to the outsole of this $220 shoe, a critical component where substantial durability is essential to justify such an investment.

On Cloudmonster Hyper outsole

The rubber coverage and outsole design feature the brand's DNA, including multiple grooves for enhanced flexibility, with only slight modifications from the regular Cloudmonsters.

Before conducting our final Dremel test, we measured the hardness of the rubber. It registered at 86.0 HC on our Shore C durometer, which is relatively hard and suggests promising durability. But let's wait until we check it out!

On Cloudmonster Hyper Outsole hardness
Test results
Cloudmonster Hyper 86.0 HC
Average 80.5 HC
We use an average of four tests. The photo shows one of those tests.
Compared to 280 running shoes
Number of shoes
52.1 HC
Outsole hardness
93.0 HC

Outsole durability

The wait was brief, right? In this final test, we fired up the Dremel one last time on this shoe, giving it a well-deserved break afterward!

The results left us thoroughly impressed. With only a 0.6-mm dent in the rubber, you can be confident that the Cloudmonster Hyper outsole will withstand wear and tear, regardless of your favourite running surface.

On Cloudmonster Hyper Outsole durability
Test results
Cloudmonster Hyper 0.6 mm
Average 0.9 mm
Compared to 141 running shoes
Number of shoes
0.0 mm
Outsole wear
2.0 mm

Outsole thickness

And for further evidence of its durability, we measured the outsole at 2.8 mm thick.

Although this is thinner than what's typical for daily trainers, it’s ample for this durable rubber. We even believe On could reduce it slightly in the next version to further optimize the weight.

On Cloudmonster Hyper Outsole thickness
Test results
Cloudmonster Hyper 2.8 mm
Average 3.2 mm
Compared to 299 running shoes
Number of shoes
0.0 mm
Outsole thickness
6.6 mm

Weight

Discussing weight, this represents one of the most significant upgrades justifying the Hyper's price increase. 

Weighing in at 9.1 oz (258g), it marks a notable improvement over the Cloudmonster 2, which registered 10.30 oz (292g) on our scales—a difference that’s evident regardless of pace.

We found that the use of state-of-the-art Helion HF (Pebax) foam and the removal of the Speedboard plate are key factors in this weight reduction.

On Cloudmonster Hyper Weight
Test results
Cloudmonster Hyper 9.10 oz (258g)
Average 9.35 oz (265g)
Compared to 300 running shoes
Number of shoes
5.26 oz (149g)
Weight
12.56 oz (356g)

Cushioning

Heel stack

The Cloudmonster Hyper truly lives up to its name with a minor increase in stack height compared to the regular Cloudmonster.

Though not as towering as some ultra-tall supertrainers, its 39.7 mm heel stack provides ample cushioning for even the most demanding long runs of marathon training. Additionally, it stays just under the 40-mm limit set by World Athletics, although we're 100% sure that you won't race in a supertrainer if you're care about this rule...

On Cloudmonster Hyper Heel stack
Test results
Cloudmonster Hyper 39.7 mm
Average 33.6 mm
Compared to 299 running shoes
Number of shoes
7.6 mm
Heel stack
42.7 mm

Forefoot stack

The forefoot stands impressively high too, exceeding the 30-mm threshold at 33.0 mm.

On Cloudmonster Hyper forefoot

This height makes the shoe an excellent choice for forefoot and midfoot strikers in our view, not just due to the substantial stack but also because the premium Helion HF foam is strategically placed in this area, rather than in the heel. Check it out below!

On Cloudmonster Hyper Forefoot stack
Test results
Cloudmonster Hyper 33.0 mm
Average 24.9 mm
Compared to 299 running shoes
Number of shoes
7.6 mm
Forefoot stack
35.8 mm

Drop

On claims a 6-mm drop for the Cloudmonster Hyper, and our precise testing in the lab—consistent with World Athletics standards—showed a real drop of 6.7 mm. The minor 0.7-mm difference from the claimed drop doesn't concern us at all.

We also believe this shoe is clearly designed for forefoot and midfoot strikers, evidenced not just by the drop but also by the strategic placement of the Pebax-based Helion HF foam. Optimal energy return is achieved when striking with the midfoot or forefoot.

On Cloudmonster Hyper Drop
Test results
Cloudmonster Hyper 6.7 mm
Average 8.7 mm
Compared to 299 running shoes
Number of shoes
-0.8 mm
Drop
16.1 mm

Insole thickness

The insole is 4.4 mm thick—essentially, it's an average EVA insole like in any other shoe. No fancy stuff, nothing out of the ordinary here, so let's move on to more intriguing features.

On Cloudmonster Hyper Insole thickness
Test results
Cloudmonster Hyper 4.4 mm
Average 4.5 mm
Compared to 295 running shoes
Number of shoes
1.5 mm
Insole thickness
7.3 mm

Midsole softness

Note: a low durometer measurement equals a soft material, whereas a high measurement means it's firm.

While the insole might be even boring, akin to what you’d find in a budget-friendly shoe, the midsole of the Cloudmonster Hyper is a different beast altogether. On has finally introduced its top-tier foam into a training shoe, rightfully earning it the "Supertrainer" badge for us.

It's all sunshine in the Helion HF world, as On has opted to move away from the "CloudTec" system in this white foam.

Scoring 17.5 HA on our durometer, the Pebax-based Helion HF (Hyper Foam) not only provides a propulsive and bouncy feel underfoot but also significantly reduces weight, powering up the Cloudmonster Hyper.

Moreover, the ride is softer than usual compared to other On shoes, particularly for those who strike with the midfoot or forefoot. We also noted that On has removed the Speedboard plate, a decision we've long thought beneficial for many models, and it's a welcome change in the Hyper.

On Cloudmonster Hyper Midsole softness
Test results
Cloudmonster Hyper 17.5 HA
Average 21.4 HA
We use an average of four tests. The photo shows one of those tests.
Compared to 227 running shoes
Number of shoes
8.5 HA
Midsole softness (soft to firm)
41.5 HA

Secondary foam softness

Note: a low durometer measurement equals a soft material, whereas a high measurement means it's firm.

While we would have preferred the Cloudmonster Hyper to feature only Helion HF, like many supertrainers on the market today, it actually uses a dual foam configuration. This setup includes a top-tier foam (white) paired with a cheaper, EVA-based foam (green).

The secondary foam, Helion (EVA + OBC), primarily situated in the heel, serves as a carrier to protect the Helion HF. It retains the distinctly firmer feel typical of On's design, and the inclusion of CloudTec in the structure helps to slightly soften the ride.

For the next version of the Hyper saga we really hope to see even more Helion HF in the shoe, especially in the heel. It's also important to remember that the Hyper, while being part of the Cloudmonster family, it's not a renamed version 3. Think of it as the Superblast versus the Novablast 4.

On Cloudmonster Hyper Secondary foam softness
Test results
Cloudmonster Hyper 28.8 HA
Average 25.3 HA
We use an average of four tests. The photo shows one of those tests.

Difference in midsole softness in cold

We appreciated how the Cloudmonster Hyper performed in mild temperatures, but we were also curious about its behavior in extremely cold winter conditions.

To test this, we froze it for 20 minutes and then checked again the Helion HF foam with the durometer. Post-freezing, the foam became 21.4% firmer—an average result. We expected greater resilience from Pebax foam.

On Cloudmonster Hyper Difference in midsole softness in cold
Test results
Cloudmonster Hyper 21.4%
Average 25.6%
Compared to 226 running shoes
Number of shoes
0%
Difference in midsole softness in cold
100%

Rocker

While most supertrainers are adopting rockered soles, On maintains a flatter profile, particularly in the heel area, catering to runners who primarily strike with the midfoot or forward.

On Cloudmonster Hyper toe spring

However, we discovered that the Cloudmonster Hyper features a much more pronounced toe spring compared to the Cloudmonster 2, which becomes clearly noticeable at marathon pace or faster.

Stability

Lateral stability test

There's no question that the Cloudmonster Hyper is a neutral running shoe, noted especially for its significant height and absence of specific stability features.

Despite this, it stands out as one of the most stable supertrainers currently available.

Torsional rigidity

We pinpointed several features that boost the stability of the Cloudmonster Hyper, including the robust midsole sidewalls and the firm Helion foam. Yet, there's even more to its stable ride.

A standout trait that enhances the shoe's stability is its high torsional rigidity. We gave it a 4/5 rating after noting its resistance to bending during our tests.

Test results
Cloudmonster Hyper 4
Average 3.2
Compared to 278 running shoes
Number of shoes
1
Torsional rigidity
5

Heel counter stiffness

We discovered that the heel counter of the Cloudmonster Hyper is designed to accommodate most runners with moderate stiffness, which we rated at 3/5. This level offers a solid balance of stability without being cumbersome.

Test results
Cloudmonster Hyper 3
Average 2.8
Compared to 262 running shoes
Number of shoes
1
Heel counter stiffness
5

Midsole width in the forefoot

One aspect that sets On apart from many running shoe brands is its consistent choice to produce narrow or average-width soles, even in its higher-stacked trainers like the Hyper. This is great because it gives runners a variety of options beyond the usual offerings—we think a uniform approach across brands ultimately limits the customer's choices.

We appreciated the 114.8-mm sole width we meticulously measured in the lab—it creates a streamlined, agile supertrainer that feels far from clunky. Although this design might affect stability a bit, it brings other advantages that many runners can value.

On Cloudmonster Hyper Midsole width in the forefoot
Test results
Cloudmonster Hyper 114.8 mm
Average 113.7 mm
Compared to 300 running shoes
Number of shoes
100.5 mm
Midsole width in the forefoot
126.5 mm

Midsole width in the heel

The heel is noticeably narrower (87.9 mm) than the forefoot when compared to the average shoe, reinforcing our earlier observation in this review that this shoe is particularly well-suited for midfoot or forefoot strikers.

On Cloudmonster Hyper Midsole width in the heel
Test results
Cloudmonster Hyper 87.9 mm
Average 90.4 mm
Compared to 300 running shoes
Number of shoes
74.9 mm
Midsole width in the heel
106.6 mm

Flexibility

Stiffness

Again: If On aimed to break away from the typical supertrainer mold, they certainly succeeded.

Our experiences during runs and in this 90-degree bend test reveal that this shoe is the most flexible in its class. With a resistance measure of just 23.2N (no Speedboard plate!), it offers comfort not only for running but for a variety of activities.

Test results
Cloudmonster Hyper 23.2N
Average 29.1N
We use an average of four tests. The video shows one of those tests.
Compared to 282 running shoes
Number of shoes
2.2N
Stiffness
94.4N

Size and fit

Toebox width at the widest part

The Cloudmonster 2 was already among the widest and most spacious trainers available in the market, making it a favorite for runners with wide feet. Surprisingly, On has taken it a step further with the Hyper, which we discovered boasts a mind-blowing width of 104.9 mm.

On Cloudmonster Hyper fit

This expansion is fantastic news for those who prefer a roomy fit or have wider feet, though it might not cater as well to runners with narrower feet.

On Cloudmonster Hyper Toebox width at the widest part
Test results
Cloudmonster Hyper 104.9 mm
Average 98.4 mm
Compared to 300 running shoes
Number of shoes
89.5 mm
Toebox width at the widest part
109.1 mm

Toebox width at the big toe

In the big toe area, we measured 80.3 mm, indicating a moderate taper that provides ample room for toe splay. We appreciate this design, particularly as this shoe excels during long runs.

Additionally, we noted sufficient vertical space for the toes.

On Cloudmonster Hyper Toebox width at the big toe
Test results
Cloudmonster Hyper 80.3 mm
Average 78.2 mm
Compared to 174 running shoes
Number of shoes
60.4 mm
Toebox width at the big toe
92.5 mm

Tongue: gusset type

The semi-gusseted tongue that we found is key given the tongue’s sleek profile, ensuring a great lockdown at any pace.

On Cloudmonster Hyper Tongue: gusset type
Test results
Cloudmonster Hyper Both sides (semi)

Comfort

Tongue padding

As we've highlighted in this lab review, the Cloudmonster Hyper marks a significant reduction in weight compared to its predecessor, the Cloudmonster 2. Surprisingly, this isn't due to changes in the tongue.

On Cloudmonster Hyper laces

The rubberized laces feel exceptionally premium, yet that's what we expect in a $220 shoe.

Actually, the Hyper features a more substantial 2.6-mm tongue—slightly plusher yet still sleek—compared to the 1.5-mm of the Cloudmonster 2. This enhancement contributes to a more comfortable instep.

On Cloudmonster Hyper Tongue padding
Test results
Cloudmonster Hyper 2.6 mm
Average 5.6 mm
Compared to 297 running shoes
Number of shoes
0.5 mm
Tongue padding
14.2 mm

Heel tab

Continuing with the design of its siblings (Cloudmonster v1 and v2), On has again decided to omit a heel tab from the Cloudmonster Hyper. This consistent feature—or lack thereof—aligns with the series’ design philosophy.

On the other hand, we found that the heel collar is taller than most shoes, which effectively secures the heel but may chafe the Achilles for those who prefer running in no-show socks.

On Cloudmonster Hyper Heel tab
Test results
Cloudmonster Hyper None

Removable insole

The insole is not glued, which is a plus, as you can swap it for third-party orthotics, especially with such a roomy upper like this one.

On Cloudmonster Hyper Removable insole
Test results
Cloudmonster Hyper Yes

Misc

Reflective elements

Unfortunately, On has decided not to include reflective elements in the Cloudmonster Hyper. That's a bummer in a $220 kick.

On Cloudmonster Hyper Reflective elements
Test results
Cloudmonster Hyper No