On’s Cloudboom Max sneaker was made for marathon runners who move through their week with intention — training blocks, recovery days, city miles, week*** long runs. The Helion™ HF foam gives it that bouncy feel underfoot, while the Speedboard® keeps you rolling forward without the stiffness of carbon. It’s comfortable enough to wear for hours, stable enough when fatigue hits and makes marathon prep feel more manageable. Suitable for Racing & Road Running Breathable Mesh Uppers Cloud Tec® Cushioning 2-Layer Helion™ HF Hyper Foam Glass Fiber-Infused Speedboard® 8mm Heel to Toe Drop Rubber Outsoles Lace Up Closure Branding Throughout Style Code: 3WF30180462
