On Running Cloudswift 4 delivers responsive propulsion and breathable comfort for urban running and all-day wear. The design pairs dual-density Helion™ foam with a flat-knit upper for a cushioned, energetic ride. Key attributes: Navy | Ink | Textile | Dual-density Helion™ foam midsole | Breathable knit upper | CloudTec® cushioning for soft landings and responsive take-offs | Nylon-blend Speedboard for enhanced energy return | Lace closure for adjustable lockdown | One-piece flat-knit upper | Perforated toe box | Updated midfoot cage construction | Heel pull tab | Dimensions & fit: Snug, sock-like fit with secure midfoot lockdown | Composition & care: Upper: Textile | Lining: Textile | Midsole: Helion™ foam | Speedboard: Nylon-blend | Outsole: Synthetic