Features: Smooth Ride. 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. Breathable at All Times. 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. Adjusted Tongue. Fully adjustable Flyknit tongue can be pulled out for a style perspective or toggled and tailored to different types of runs. It works with Flywire to create that just-right sensation of comfort and security. Nonknit collar is made of supersoft foam textile that complements the Flyknit. A wide shape provides a more stable ride, helping release energy with every step. Increased rubber at the outsole helps deliver traction and durability. Cushioned collar provides soft comfort. Loop at the heel offers easy on and off.