This pair is ideal for running longer distances. Nike Flyknit material is placed around the collar, providing extra stretch for easy on and off. It has a sock-like feel that helps contain your foot and feels secure. The upper is made with lightweight mesh for a softer, more breathable feel that conforms to your foot. Nike React technology is a lightweight, durable foam that delivers a smooth, responsive ride. It combines with an internal carbon fiber plate for flexibility in your stride.