Lightweight Flyknit upper features targeted areas of support, stretch and breathability for superior comfort. Nike React technology provides lightweight, responsive cushioning. Heel pull tab for easy on-Off. Flywire technology offers extra support and stability through the midfoot. Nonknit collar is made of supersoft foam textile that complements the Flyknit. Cushioned collar provides soft comfort. Curved rocker outsole delivers flexbility during take-Off, a smooth ride when moving forward and cushioning during landings. Increase rubber in outsole offers durability and traction.