Rubber sole Nike React technology is a lightweight, durable foam that delivers a smooth, responsive ride. 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 forwards, and cushioning at ground contact. An advanced Flyknit upper provides breathability where you need it most. It's strong and durable, helping to keep your foot secure with every mile. Flywire technology offers extra support and stability through the midfoot. Fully adjustable Flyknit tongue can be pulled out for a style perspective or toggled and tailored to different types of runs. Stay on your feet with soft and supportive cushioning, built to help keep you on the run. A wider forefoot and higher foam stacks provide cushioning to help keep you fresh, giving you the peace of mind to pound the pavement every day. The springy responsiveness will surprise you too, adding an element of pure speed to 1 of our most tested shoes to help you go longer, faster and further than ever.