Cloudflow 4 Running Shoes The Cloudflow has been updated with a dual-density midsole, encasing a spoon-like shaped nylon blend speedboard in a sandwich construction, providing a forward rolling sensation and delivering a noticeable energy return. The thin engineered woven upper, highly breathable and intuitively lightweight, enhances the overall experience by providing responsive comfort. Increased cushioning offers superior impact absorption and keeps your legs feeling fresh for extended periods. The plush step in comfort with a new lining and an absence of an outside channel, preventing any unwanted stone collection.