Nike ZoomX foam is responsive and lightweight, giving you bounce with every step. Shaped like a rocker, the foam provides support for the 3 phases of a runner's stride. It offers flexibility when your foot rises off the ground, a smooth ride when your foot is moving forward and cushioning at ground contact. Keep pushing your runs to the limit. The Nike ZoomX Invincible Run Flyknit 2 keeps you going with the same super-soft feel that lets you feel the potential when your foot hits the pavement. We created the shoe with plenty of springy responsiveness and our highest level of support to keep you feeling secure and competitive. It's one of our most tested shoes, still designed for you to stay on the road and away from the sidelines.