On Running Cloud X 4 AD training shoes combine a breathable engineered textile upper with a forked Speedboard® for flexible, stable movement — designed for versatile training and everyday wear. Key attributes: Gray | Grey | Textile | Breathable upper | Enhanced heel support for stability | Cushioning and good grip | Lightweight feel | Star lacing system for a personalised fit | Forked Speedboard® for natural foot movement | Segmented rubber sole for cushioning | Streamlined silhouette | Subtle red accents | Engineered mesh upper | Dimensions & fit: Sole height: 2 cm | Sole height (highest point): 3.5 cm | True to size | Composition & care: Textile | Synthetic | Rubber