Aptly named the Cloud X, these trainers from On Running are developed to be lightweight on your feet without sacrificing performance. Crafted with a knitted upper, they're set on a reactive CloudTec® outsole in Helion™ superfoam for comfort while an internal Speedboard® propels you forward. Reactive CloudTec® outsole in Helion™ superfoam for explosive movements in all directions Moulded cushion pads in the heel for stability Internal Speedboard® for immense energy return Lightweight engineered mesh upper for breathable durability Ideal for neutral runners looking to run faster