Nike React technology delivers a soft, responsive ride. 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. Flywire technology features an elastic design that intertwines with the Flyknit upper, helping your foot feel secure as you run. Flyknit Loft is the latest update to the popular material. 3 forefoot layers combine for a lightweight, breathable and durable feel that keeps your foot comfortable. Molding around the heel keeps you feeling secure so you can focus on your route. Increased rubber at the outsole helps deliver better traction and durability.