An all-new version of Flyknit technology is stronger and more durable than previous iterations. It features 3 distinct layers to help keep your foot secure. Higher foam stack heights provide a softer feel. A wider shape provides a more stable ride, helping release energy with every step. The shape of the Nike React foam midsole is all about zonal performance. It provides support for the 3 phases of a runner's stride—flexibility at toe-off, a smooth ride at mid-stance and cushioning at contact. Geometric shapes made of colorful skins are placed around the heel and sides, delivering an eye-catching refresh. Less material between the insole and the midsole means you're closer to the foam, creating a softer, more responsive experience. Increased rubber at the outsole helps deliver traction and durability.