The ON Cloud X is a lightweight powerhouse that is great for a variety of sport workouts and runs. The CloudTec sole of the Cloud X is made for explosive movement in all directions. The zero-gravity foam keeps weight to an absolute minimum for maximum mobility. The lean, engineered heel cap is precision-molded to keep you stable without strain. The dual-density sockliner and seamless tongue are both designed for comfort and hold in mixed-sports workouts. The Cloud X also has a mesh upper, that is made with a knit-weave. It is light and breathable, provides support without restricting freedom of movement while it helps keep your feet cool when the workout heats up. Reflective details ensure night visibility.