The training shoe for fast intervals. With Helion™ HF hyper foam and a nylon-blend Speedboard® for high energy return. A layer of Helion™ HF for max energy return and rebound Propulsive glass fiber nylon-blend Speedboard® Engineered woven mesh upper that's breathable and ultralight Design inspired by On's pinnacle, race-winning super shoes Extreme rocker shape for a fast, forward-rolling ride Updated toebox design for fast training sessions Forefoot grip for added support during the toe-off phase. Features: Now with Helion™ HF: Inspired by On's pinnacle race-day shoes, the midsole features a layer of Helion™ HF for maximum rebound. Expect a responsive ride with a serious kick of energy return. Athlete-inspired design: The large logo and eye-catching grip pads on the tip of the toe box mirror the design of our elite-level racing shoes. So now, everyone can look like an On athlete. Maximum propulsion: Strong yet springy, the nylon-blend Speedboard® is infused with glass fibers for powerful forward propulsion. The rockered forefoot further enhances this forward-rolling motion. UPPER: The engineered woven mesh upper provides maximum breathability and a weightless feel on the foot. Features reflective elements on the heel and logo for an eye-catching look. Drop: 6mm
