On Cloud Runners - CloudflashW9, Eu 40.5, UK 7worn once or twice, like newStep into high speeds every time you lace up the On Cloudflash! With a carbon-fiber Speedboard™ and two layers of Helion™ super foam, these running shoes are ready for race day. An ultra-light, single-layer mesh offers excellent airflow to keep you cool as you breeze through the miles. Feel the explosive lift-offs on the carbon-fiber Speedboard™, helping you reach high speeds with ease. Twin layers of CloudTec™ and Helion super foam sit above and below the plate, increasing comfort when you push the pace.Who's it for?Competitive runners who know that every second matters on race day when you're chasing after personal records.Neutral runners looking for shoe that provides a smooth and responsive ride that guides you to the finish line.