On Running Cloud X2 Trainers. Built with a lightweight construction, these low top trainers are designed with a high-quality mixed fabrication to the upper adorned with engineered mesh accents and a function-focused weave pattern for added breathability and durability in a no-sewn design. Sitting upon a Cloud Tec® outsole with Helion™ superfoam, these trainers have been specifically designed to protect you from harsh activities. Styled with a full lace fastening, rounded toe and branding throughout.