On Running Cloudtilt pairs CloudTec Phase cushioning with Helion superfoam to deliver a smooth, responsive heel-to-toe transition—designed for comfortable all-day city movement. Key attributes: Eclipse | Black | Polyester mesh | CloudTec Phase for seamless heel-to-toe transition | Helion superfoam for high energy return | Breathable mesh upper | Lace closure (speed laces) | Internal sock construction for easy on/off | Precision-crafted with finite element analysis | Engineered cloud elements for targeted cushioning | Smooth, ultra-light midsole | Dimensions & fit: Weight: 303 gr | Sole height: 4 cm | Regular fit | Size US 9 corresponds to EU 40 | Composition & care: 100% polyester (mesh upper) | Helion superfoam (midsole) | Rubber (sole)