Unlock your speed with the On Cloudflow 5. Built for the moments when you're ready to push beyond what feels comfortable, the Cloudflow 5 brings race-day technology to your everyday training. With breakthrough Helion™ HF hyper foam inspired by On's elite racing shoes and a glass fiber-infused Speedboard® that transforms every step into forward momentum, the Cloudflow 5 gives you that exhilarating feeling of truly letting loose. Details: Upper: Engineered woven mesh creates an ultralight, breathable fit that moves with you seamlessly. The updated toebox design accommodates your foot's natural expansion during intense efforts, while reflective elements keep you visible during those early morning or evening runs. Midsole: Revolutionary Helion™ HF hyper foam delivers maximum energy return and rebound with every footstrike. Traditional CloudTec cushioning provides On's signature dynamic feel, while the rocker shape creates that addictive forward-rolling sensation that makes picking up the pace feel effortless. The nylon-blend Speedboard® infused with glass fibers creates powerful propulsion without the stiffness of full carbon. Outsole: Forefoot grip pads add support during toe-off, helping you maintain control when the speed really kicks in.