The Cloudboom Echo 3 is On’s most performance‑oriented carbon‑plated racing shoe, designed for runners targeting sub‑3‑hour marathons. Its midsole uses Helion™ HF super‑critical foam combined with the CloudTec® hollow‑pod structure and a full‑length SPEEDBOARD™ carbon plate, delivering powerful propulsion and a strong rolling sensation.
The upper is made of TPU tensile‑resistant material, offering strong lockdown but running slightly narrow, so trying it on or choosing half a size up is recommended. The insole features silicone‑printed anti‑slip detailing to enhance stability.
Overall, the ride is firm, springy, and stable, making it suitable for advanced runners who land on the forefoot or midfoot in half‑marathon to marathon races. Testing shows that it performs best at paces faster than 2:50 marathon speed and requires strong leg drive, making it unsuitable for slower running.
If you’re looking for a carbon‑plated racing shoe with extreme propulsion, stable support, and elite‑level performance, the Cloudboom Echo 3 is one of the most iconic options in On’s lineup.
