On Running's Cloudswift 4 Mesh Trainers combine CloudTec cushioning with a breathable flat-knit mesh upper to deliver a responsive, comfortable ride for city runs and all-day wear. Key attributes: Gray | Grey pink | Flat-knit engineered mesh | Breathable upper | Dual-density Helion™ superfoam midsole for responsive cushioning | CloudTec® cushioning for shock absorption | Rubber outsole for reliable traction | Lightweight construction | Reinforced lacing system | Padded heel collar | One-piece, sock-like upper | Integrated Speedboard for propulsion | Perforated toe box | Low-profile urban silhouette | Iconic On logo and Swiss flag detailing | Dimensions & fit: Snug, sock-like fit that adapts to foot shape | Composition & care: Upper: polyester (flat-knit engineered mesh) | Midsole: Dual-density Helion™ superfoam | Speedboard: Nylon 6 | Reinforcement: TPU | Outsole: Rubber