Designed to make speed available to everyone, the On Womens Cloudflow 5 in Fog/Eclipse is built for speed work and fast training sessions. It features a large layer of Helion HF foam for lightweight cushioning with excellent energy return, and a glass fibre and nylon blend Speedboard for added propulsion. The Cloudtec pod cushioning utilizes Helion foam, and the shoe's rocker design enhances forward motion for effortlessly fast miles. A durable outsole provides excellent traction. The engineered mesh upper offers breathable containment for optimal performance. Weight: 270g (men's US 8.5) Stack height: 36/28mm Heel offset: 8mm Features: Cloudtec cushioning with Speedboard, woven engineered mesh upper, dual-density midsole with Helion HF and Helion foam.