The Zoom Fly 6 is with you every step of your run. Lighter than the Zoom Fly 5 and stocked with ZoomX foam, it provides responsive energy return with every stride while the carbon-fibre plate helps propel you further. Benefits:ZoomX foam, Nike's lightest and most responsive foam, delivers our most energy return with every stride you take. The full-length carbon-fibre plate increases efficiency and responsiveness. The thin rubber outsole is lightweight and grippy on the road. The upper is made from mesh, offering high-end training-shoe comfort without sacrificing weight or breathability.