Cloud X 4 - Caper | SalmonUltralight and ultra flexible for feel good workouts Born from running. Made for everything. The Cloud X 4 is the versatile training shoe for fitness lovers. Now with a new Speedboard design for better forefoot flexibility, as well a softer and more cushioned feel underfoot. Softer cushioning The Helion superfoam midsole feels softer and more cushioned underfoot. Extra padding in the heel means more comfort while running. More stable. More soft. For