The Cloud X by ON is for those who refuse to define themselves by one activity. A lightweight and ultra-agile shoe built to handle punishing paces and intense mixed-sport workouts. It's at home on the track, street and in the gym. Get stronger, run longer.The Cloud X by ON uses materials high in quality and low on weight. Flexible but tough, the engineered mesh upper has a function-focused weave pattern for durability, breathability and agility. And the no-sew design maintains a perfect fit during any activity that gets you fit.Reactive and dynamic, the CloudTec outsole in Helion superfoam is made specifically for explosive movements in all directions. Molded cushion pads in the heel offer gentle security and the Speedboard within energizes your every step. Raised sidewalls add stability and agility.