The latest in Flywire technology features an elastic design that intertwines with the Flyknit upper, helping your foot feel secure as you run. FlyKnit Loft uses 3 forefoot layers. They combine for a lightweight, breathable and durable feel that keeps your foot comfortable. 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. Increased rubber at the outsole helps deliver better traction and durability. Molding around the heel keeps you feeling secure, so you can focus on your route.