The On Cloudboom Max is for all levels of marathon runners. Built for long distance, the ultra-lightweight breathable mesh upper molds to your foot and feels like nothing over long distances and time, so you can focus on the race. Providing responsive cushioning that absorbs the impact in each steam. A double layer of Helion Hyper Foam in the midsole lends a cushioned ride, whiles paired with the glass-fibre infused speedboard, your getting incredible energy return in each step and maximising the efficiency in each stride.