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Thomas and Meg give their thoughts on the On Cloudboom Echo 3. The big story and update to the Cloudboom Echo 3 is the HF superfoam midsole, a fully recyclable midsole made from Pebax and 46% bio-based materials (derived from castor beans). Paired with a full-length Speedboard carbon fiber plate and Cloudtec design, the elements come together to bring On into the modern race-day world. The upper is also race-ready, featuring a microfiber material that’s breathable and reduces water absorption. It’s light, it’s fast, and it will cost you: $289.99, to be exact.