On Running's Cloud X 4 combines breathable mesh and CloudTec cushioning to deliver lightweight, responsive support for versatile training and all‑day wear. Key attributes: Blue | Navy | Mesh | Breathable | Lightweight | Responsive cushioning | Energy return | Stable multi-directional support | Secure lace-up closure | Speedboard for propulsion | CloudTec impact-absorbing elements | Navy mesh upper | White branding and sole | Grey heel accents | Swiss flag and 'Swiss Engineering' detailing | Prominent OC logo | Composition & care: High-performance mesh upper | Helion superfoam midsole | CloudTec sole elements | Speedboard