The On Cloudboom Men's Running Shoe is an ultra-lightweight racing shoe and the first to include carbon-fibre. It's designed and built for fast marathons and road races. The first On Running shoe to feature the new carbon-fibre infused Speedboard for a more explosive run, sandwiched between two layers of CloudTec in Helion superfoam for a more adaptive fit. Fantastic cushioning but still with the ability to handle sharp turns at speed on asphalt. This extremely agile shoe has a single layer of ultralight engineered mesh in the upper that gives maximum breathability and keeps the temperature down. The forefoot has been reinforced for stability on any sharp changes in direction and a new traction pattern on the sole makes it unstoppable, even in wet conditions. To put it simply, the Cloudboom has everything you need for your fastest race ever.