On Cloudboom Max

The On Cloudboom Max is a max-cushioned marathon shoe built to make long-distance running feel smoother, more efficient, and easier to manage when the miles start to bite. Designed for marathon training and confident race-day efforts, it pairs On’s energetic Helion HF hyper foam with a fast-rolling CloudTec geometry that softens impact without turning mushy. A glass fiber-infused Speedboard adds structure and steady propulsion, while the breathable mesh upper and padded heel keep the fit comfortable and secure deep into your long runs.

Highlights

• CloudTec cushioning system tuned for a fast, rolling ride that helps you stay relaxed and consistent over long distances
• Double layer of Helion HF hyper foam delivers responsive energy return while keeping the platform protective for marathon training mileage
• Glass fiber-infused Speedboard improves efficiency and support with a smoother, less aggressive feel than many carbon-plated racers
• Stable, confidence-building midsole shaping helps keep transitions controlled, especially as fatigue sets in late in the run
• Breathable mesh upper adapts to foot movement over time, balancing ventilation with a secure hold for longer efforts
• Padded heel and structured rearfoot design enhance step-in comfort and improve lockdown when you pick up the pace
• Durable rubber outsole provides reliable road grip for workouts and race-day corners alike