Design: upper is made with lightweight mesh for a softer, more breathable feel that conforms to your foot. NIKE flyknit is placed around the collar, providing extra stretch for easy on-and-off. Midfoot support arrives courtesy of 4 individual pieces of webbing that intertwine with the laces. Internal carbon fiber plate for optimal flexibility in your stride. Fresh colors and graphics nod to the days of the nike athletic department and nike international. In-shoe comfort: internal heel pod helps keep your foot comfortable, while delivering a better, more secure fit than the zoom fly 3. NIKE react technology is a lightweight, durable foam that delivers a smooth, responsive ride.