Sock-like upper with 3D heel padding CloudTec® cushioning provides shock absorption  Classic laces Wider clouds for a more responsive cushioned sensation Engineered knit upper  CloudTec midsole with Bio Attributed EVA  Newer, more updated outsole with a snug fit Nylon blend Speedboard  The On Women's Cloudswift 4 combines performance and comfort for the ultimate running experience. Featuring a sock-like upper with 3D heel padding, it ensures a snug, secure fit with every stride. The CloudTec® cushioning delivers superior shock absorption, while the wider clouds provide a more responsive, cushioned sensation. The engineered knit upper and Bio Attributed EVA midsole bring a sustainable edge to the design, and the updated outsole offers a more precise, tailored fit. Finished with a nylon blend Speedboard for smoother transitions and added flexibility. Product Code: 3WF10763987