Meet your new training partner. The Cloud X 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 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. The Cloud X 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.