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 forward, 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. Size 12 some wearing of right heel loop