Experience explosive performance during interval training thanks to the dynamic support of the Nike Zoom Fly 6. Get the most out of your fast running sessions with the unparalleled support of the Nike Zoom Fly 6. >Midsole The Nike ZoomX foam in this shoe ensures optimal energy return: every step provides energy for the next. ZoomX has an energy return of 85%, giving you the feeling of being propelled forward as you walk. In addition, ZoomX is lighter and softer than other Nike foams. The midsole also contains a Flyplate, also called a Carbon Fiber plate. This plate works like a kind of spring. It propels you forward as you walk and contributes to the very responsive feel of the shoes. Upper The mesh upper makes the Zoom Fly 6 very breathable and provides a comfortable feeling while running. Outsole The rubber outsole provides good grip and traction while running.