Designed for versatility, the Cloud X 4 Ad trainers from ON are dynamic and durable. From daily commutes to HIIT cardio, the newly engineered mesh upper delivers seamless performance with a lightweight and breathable feel. Featuring an updated heel fit and fork-shaped Speedboard® that increases flexibility, making for a comfortable wear. These trainers offer light, cool, and breathable comfort with a mesh upper and CloudTec cushioning. Raised collar edges and a wide base provide top stability.