On Cloudmonster 3 Review: Big Cushion, Bigger Miles

Can On’s boldest max-cushion running shoe deliver the smooth, efficient ride serious runners need for long training miles? Athlete Raymond Sng puts the Cloudmonster 3 through its paces.

PHOTO: SPORTPLUS.SG / ALDRICH GOH

This Sole Mates shoe review is done in collaboration with iRun Singapore, Singapore's premier running shoe store. In the crowded world of max-cushion running shoes, the On Cloudmonster 3 is one of the most visually distinctive trainers on the market.

With its oversized CloudTec pods, rocker geometry and maximal stack, the third generation of On’s “Monster” series promises big cushioning and smooth long-run efficiency.

But does the Cloudmonster 3 live up to the hype for serious runners — or is it more style than substance?

For this week’s Sole Mates feature, Singapore-based endurance athlete Raymond Sng laces up the latest from On to find out.

First Impressions: Maximum Cushion, Classic On DNA

The Cloudmonster line has always been about bold cushioning, and the third iteration keeps that formula intact while refining the ride. The shoe features a redesigned midsole with three rows of smaller CloudTec pods and On’s Helion foam, creating a more consistent transition through each stride.

On foot, the shoe immediately feels structured and stable — a signature characteristic of the brand.

“The Cloudmonster 3 feels like a shoe that wants to keep you moving forward,” says Raymond Sng. “It’s not overly soft, but the rocker geometry helps you roll through your stride effortlessly.”

That rocker design, combined with a stiff midsole and Speedboard plate, produces what reviewers often describe as a forward-rolling ride that encourages steady pacing over long distances.

PHOTO: SPORTPLUS.SG / ALDRICH GOH

Ride & Performance: Smooth, Structured, Surprisingly Firm

Despite its towering stack height, the Cloudmonster 3 isn’t the plushest max-cushion shoe on the market. Many testers note that it leans firmer than expected.

Running shoe testing site RunRepeat describes it as a “high stack, firm ride” daily trainer with premium build quality and a pronounced rocker feel.

That firmness comes partly from the Helion foam midsole and Speedboard plate combination, which adds rigidity and stability but sacrifices some bounce.

“This isn’t a trampoline-style shoe,” says Sng. “Instead of springiness, you get consistency — which actually makes it great for steady long runs or aerobic training.”

For runners who prefer a more controlled ride rather than ultra-soft cushioning, this balance may actually be a strength.

PHOTO: SPORTPLUS.SG / ALDRICH GOH

Fit & Upper: Premium Feel with Improved Lockdown

On has upgraded the upper with a softer engineered mesh and improved tongue design to enhance comfort and lockdown.

Reviewers highlight a secure midfoot fit and padded heel collar, while the gusseted tongue helps keep the foot centred during longer runs.

Sng notes that the shoe feels “premium” the moment you slip it on.

“The upper feels plush and well-built. It’s the kind of shoe you could wear for both training runs and casual days.”

However, breathability may still be a weak spot. Lab tests have rated the ventilation relatively low due to the dense mesh construction.

Stability & Geometry

Although the Cloudmonster 3 is technically a neutral shoe, it provides surprising stability thanks to its rigid platform and structured heel counter.

The combination of firm foam, Speedboard plate and rocker geometry keeps the ride stable even at higher stack heights.

That makes it particularly appealing for runners who want max cushioning without the wobble that sometimes accompanies taller midsoles.

PHOTO: SPORTPLUS.SG / ALDRICH GOH

The Downsides

No shoe is perfect, and the Cloudmonster 3 comes with a few trade-offs.

The most common criticism from reviewers:

• Weight – At about 301g (10.6 oz), it’s heavier than many modern daily trainers.

• Firm ride – Some runners expecting a plush max-cushion experience may find it stiff.

• Premium price – The shoe retails around $190, placing it at the high end of the daily trainer category.

Still, the shoe’s distinctive design and durability keep it among the most recognizable models in the brand’s lineup.

Fact Sheet: On Cloudmonster 3

Category: Max-cushion daily trainer

Terrain: Road

Release date: March 2026

Price: ~$190

Spec	Details
Weight	~301 g (Men’s US9)
Heel stack	~38.6 mm
Forefoot stack	~32.2 mm
Drop	6 mm
Midsole	Helion foam + CloudTec pods
Plate	Nylon-blend Speedboard
Upper	Engineered mesh
Stability	Neutral
Best for	Daily runs, long runs, steady pacing

Who Is It For?

According to Sng, the Cloudmonster 3 shines in a specific type of running routine.

Best for long steady runs, aerobic training miles, a stylish choice to wear to run clubs for social runs, and for runners who prefer a structured ride.

The shoe is less ideal for speed workouts, runners seeking ultra-soft cushioning, and those prioritising lightweight trainers.

PHOTO: SPORTPLUS.SG / ALDRICH GOH

Raymond Sng’s Verdict

“The Cloudmonster 3 is a shoe that grows on you. It may not wow you with bounce, but it rewards consistency. For runners building mileage week after week, it’s a dependable workhorse.”

In the Sole Mates scorecard, the Cloudmonster 3 earns high marks for build quality, stability and design, though it may not be the most exciting performer in the max-cushion category.

Sole Mates Rating:

⭐ ⭐ ⭐ ⭐ ☆ (4 / 5) The On Cloudmonster 3 is available for purchase at www.irunsg.com or at selected iRun Singapore outlets (313 Somerset). #OnCloudmonster3 #iRunSingapore #SoleMatesReview