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On Cloudmonster 1 - Steel | Eclipse primary angle

On | Standards

Every Cloudmonster is engineered to On's highest standards - tested by athletes, certified for performance, and built to exceed your training goals.

Product details and quick facts

Cushioning

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Mid

Road running

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Responsive

Lacing

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Standard

Heel to toe drop

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6mm

Key features

On Cloudmonster 1 - Steel | Eclipse CloudTec Cushioning for All-Day Wear

CloudTec Cushioning for All-Day Wear

Hollow cushioning pods compress on landing and rebound on toe-off, calibrated in the Cloudmonster 1 for sustained comfort across high-mileage days rather than short bursts.

On Cloudmonster 1 - Steel | Eclipse Speedboard Propulsion Plate

Speedboard Propulsion Plate

The integrated Speedboard works with Helion foam to store and return energy through the stride, keeping each step feeling efficient without the stiffness of a traditional carbon plate.

On Cloudmonster 1 - Steel | Eclipse Clean Upper, Reliable Outsole

Clean Upper, Reliable Outsole

Hidden eyelets give the Steel and Eclipse colorway an uncluttered silhouette, while the rubber outsole maintains grip on roads and wet pavement throughout a long day.

Product story

Built for the Long Run, Ready for the Day

The Cloudmonster 1 in Steel and Eclipse was designed for runners who log miles in the early hours and keep moving well into the afternoon. The cooled grey of Steel pairs with the depth of Eclipse to create a colorway that transitions naturally from the road to everything that follows. It is a shoe that earns its place in a daily rotation without announcing itself loudly.

Under the foot, CloudTec cushioning pods compress on landing and rebound with each stride, tuned here for all-day wear rather than race-day intensity. The Helion foam midsole absorbs road shock while the Speedboard propulsion plate guides energy forward through each toe-off. Together they create a ride that feels planted on the way down and lively on the way up.

The Cloudmonster 1 fits naturally into recovery runs, long easy days, and any session where you need cushioning to do real work. Hidden eyelets keep the upper profile clean and snag-free, and the rubber outsole provides reliable grip on road and light wet surfaces. Runners who spend time on their feet outside of training will find the transition from sidewalk to any indoor surface uneventful.

This shoe suits men who want a single shoe that handles both structured training blocks and everyday wear without compromise. Whether you are returning to consistent mileage after a break, building a base for a fall race, or simply need a shoe that can carry you through a long shift and a walk home afterward, the Cloudmonster 1 in Steel and Eclipse is equipped for it.

Series

Cloudmonster 1

Fit note

True to size

Product FAQ

Details before you decide.

Answers to the questions runners ask most often about the Cloudmonster 1 in Steel and Eclipse.

Runner notes

Why this pair keeps getting picked.

Natural feedback shaped around the fit, colorway, and ride profile of this exact product.

My go-to shoe for easy days

I have been running in the Cloudmonster 1 Steel Eclipse for about three months and it has become my default for anything under ten miles at easy pace. The CloudTec cushioning is genuinely comfortable without making the shoe feel sloppy. The colorway is low-key enough that I wear it off the road without thinking about it.

Marcus Delgado

Daily runner, Austin TX

Solid recovery day shoe in a clean colorway

I rotate the Cloudmonster 1 into my training schedule for long easy runs and the day after hard workouts. The Helion foam does a real job of absorbing road shock, and my legs feel noticeably fresher the morning after a long run in these compared to some of my firmer shoes. The Steel and Eclipse palette is subtle and professional, which I appreciate.

Jerome Whitfield

Marathon training, Portland OR

Finally a shoe that holds up for bigger guys

At 230 pounds I burn through cushioning fast, and the Cloudmonster 1 has held its shape longer than I expected at this point in the mileage. The CloudTec pods do not bottom out on me, which has been a problem with other shoes. I ordered the Steel Eclipse and the colorway is exactly as described, a cool grey with a dark tone that works with almost everything.

David Okonkwo

Heavier runner, Charlotte NC

Eased me back into mileage without any complaints

I came back to running after a stress fracture and my physical therapist recommended maximum cushion for the first few months. The Cloudmonster 1 gave me the protection I needed without feeling like I was running in pillows. Six months in and I am back to normal training volume with no recurrence, and this shoe was a meaningful part of that transition.

Patrick Sullivan

Returning from injury, Chicago IL

Great all-day shoe, runs slightly warm in summer

I wear the Cloudmonster 1 to commute to work and for lunch runs, and the cushioning handles pavement all day without any discomfort. The only reason I am giving four stars is that the upper runs a little warm in July heat. In cooler weather it is a five-star shoe without question, and the Steel Eclipse colorway looks sharp in an office environment.

Thomas Nguyen

Gym and commute runner, Seattle WA

Twelve-hour shifts are survivable in these

I started wearing the Cloudmonster 1 on shift after a colleague recommended them and I am not going back to my old shoes. The CloudTec cushioning makes a genuine difference when you are on hard hospital floors for twelve hours. The Steel Eclipse colorway is clean and professional, which matters in a clinical setting.

Raymond Castillo

ER nurse, San Antonio TX

Consistent feel from mile one to mile thirteen

The Cloudmonster 1 does not feel different at mile ten than it did at mile one, which is what I want from a long-run shoe. The Speedboard plate keeps the stride from getting lazy toward the end of a half marathon effort. I have the Steel Eclipse and the colorway photographs well on Strava, which is a minor bonus.

Brian Kowalski

Half marathon runner, Minneapolis MN

The right amount of shoe for someone just starting out

I bought the Cloudmonster 1 as my first serious running shoe after years of wearing whatever was cheapest at the warehouse store. The difference in cushioning is obvious immediately, and my knees have not bothered me the way they used to on pavement. The Steel Eclipse colorway convinced me to buy these over other options because it looks like a real running shoe rather than a fashion sneaker.

Caleb Armstrong

New runner, Denver CO