On Cloud Eclipse Preview: On's Softest Max-Cushion Shoe Yet?

Introduction

On has been methodically building toward a true max-cushion shoe for a while now, and the Cloud Eclipse looks like the payoff. It slots into an extremely competitive segment, the one where shoes like the Asics Superblast and the Saucony Triumph already live, and it arrives carrying the softest, biggest stack On has ever shipped.

From the design, the Eclipse reads like the logical next step after the Cloud Surfer: the same upper language, the same CloudTec Phase midsole pods, but taken much further in every direction. Here is what the shoe looks like, what the specs tell us, and where it is likely to fit into your rotation.

A Max Stack Built From Two Years of Iteration

The evolution here is worth understanding, because the Cloud Eclipse is clearly the sum of On’s recent experiments. The Cloud Stratus used a dual-layer Helion foam setup that leaned firm, with the speedboard sitting close to the foot. The Cloud Monster softened the Helion slightly and enlarged the pods. The Cloud Surfer went softer again and introduced the CloudTec Phase formulation, replacing discrete pods with computer-generated slits in the foam.

The Cloud Eclipse combines all of that: an enormous stack of Helion foam, CloudTec Phase pods, and a speedboard under the shoe. Weight comes in at 10.8 ounces for men and 8.6 ounces for women, which places it on the heavier end of the max-cushion daily trainer category, closer to the Asics Gel Nimbus than to the Superblast.

Midsole: Big Foam, Heavy Rocker, and a Low-Placed Speedboard

Visually, the midsole is the headline. It genuinely looks exaggerated, almost like a mock-up where the corners of a Cloud Surfer were dragged outward, except these are real production photos. Exact stack heights are not yet confirmed, but the shoe uses a 6mm drop, and the heel stack is estimated at around 38mm, potentially above 40. For comparison, the Cloud Surfer sits at 32mm heel and 22mm forefoot with a 10mm drop, so a figure in the region of 42/36 or 40/34 seems plausible.

The foam is labeled Helion, and it is most likely the standard Helion compound, the same EVA olefin blend used in the Cloud Monster, Cloud Stratus, and Cloud Surfer, not the softer Helion HF variant. The profile is heavily rockered, in the same spirit as the Cloud Monster and reminiscent of the Saucony Endorphin Shift 3 and the Gel Nimbus, where a large rocker helps runners manage a huge volume of foam underfoot.

There is also a plate in the shoe. The speedboard sits at the bottom of the midsole, visible on the outsole, and it is most likely plastic given that On uses plastic speedboards in the Cloud Monster and Cloud Stratus. Placing it low rather than close to the foot is an interesting choice: speedboards near the foot create a firmer, snappier feel, while this placement should stabilize the soft platform without making the ride harsh.

Upper: On’s Signature Fit and Lockdown

On consistently produces some of the best uppers in the business, and the Cloud Eclipse looks set to continue that. The lacing system runs elegantly along the sides of the upper, in the same vein as the Cloud Stratus, and lockdown across On’s lineup has been consistently excellent.

Around the heel, the collar looks well padded. On lightened the upper on the Cloud Monster compared with the more generously padded Cloud Stratus, and the Cloud Eclipse appears aimed at that same padded, comfortable feel rather than an ultra-lightweight build.

Outsole: A Step Toward Better Durability

This is the most encouraging change. On has typically used strategically placed rubber elements on its outsoles, which delivered middling durability. A well-worn Cloud Monster shows heel rubber wearing down badly after a batch of high-mileage use.

The Cloud Eclipse switches to what appears to be full rubber coverage on the forefoot, with strategic placement retained at the heel. The rubber may also be a different or thicker formulation than previous models. For a high-mileage max-cushion shoe in the mould of the Triumph and Nimbus, durability is exactly what you want, and this layout suggests On is targeting that.

Who the Cloud Eclipse Is For

This looks like a comfortable shoe for relaxed miles where you want to take the load off your legs. On has not previously had a max-cushion shoe that delivers a genuinely soft ride, and that is the gap the Cloud Eclipse fills. The added plate appears to be a direct answer to complaints about the Cloud Surfer feeling unstable, giving structure to the softer Helion foam platform.

If you like the Gel Nimbus, the Saucony Triumph, or the Endorphin Shift, this is the next shoe in that category to consider. The marketing copy hints at control and speed thanks to the speedboard, but at nearly 11 ounces for men this is not a speed shoe. The rockered platform and speedboard should let you pick up the pace a bit, but it is unlikely to become a regular tempo or race-day option.

Buying Advice

The Cloud Eclipse makes the most sense as a high-mileage easy-day trainer for runners who want maximum comfort with enough structure to feel controlled. Waiting for confirmed stack heights and pricing is sensible, but the design points to a shoe built for the same buyers eyeing the Nimbus and Triumph. The improved outsole coverage is the detail that could make it a serious contender in that class.

Conclusion

The Cloud Eclipse looks like On finally answering the max-cushion question: a huge Helion stack, CloudTec Phase pods, a stabilizing speedboard placed low, and a more durable outsole layout. It is heavier than the fast shoes in its segment, but for relaxed, leg-friendly miles, it could be exactly what On’s lineup has been missing.