The Nike Air Zoom Tempo Next Percent Flyease is designed to provide the comfortable performance needed to push you up into your next personal best. Improved ZoomX foam technology in the footbed delivers energy return with every footfall, while a visible zoom air unit in the heel provides lightweight cushioning and springy feel. The resulting shoe has elements and feel of a racer but is made for your everyday training routine. Stacked on the heel you will find Nike React foams, providing extra cushion and secure positioning of your foot. Under all of this is an outsole grip pattern that has been created using data from hundreds of runners, putting traction exactly where it's needed and keeping you solid in a variety of surfaces. This shoe looks the part too, with a tenacious Flyknit and synthetic upper, locking you into the footbed with an asymmetrical lacing pattern. The Flyease version has a heel that collapses before snapping back into place as you step into it. A lock and release mechanism secures the fit, and you can pull the tongue to tighten. A loop at the near the toe loosens, eliminating the need to tie laces.