The Nike Epic React Flyknit features Nike’s latest foam technology designed to cushion the impact of each stride and offer the energy return needed to stay fresh late in a run. The design of the shoe consists of a forefoot, toe and arch with the help of the one-piece Nike Flyknit bootie that is precision-engineered for support, flexibility and breathability in areas where we need it most. It is minimal and close to the foot but still supportive.Nike React foam is significantly softer than EVA-based foams used in past models. So whenever you hit a bump on the road, it manages to smooth it out more effectively. In addition, the midsole had to be taller in order to avoid “bottoming-out” and wider to give runners a supportive base. To solve for that, designers extended the midsole beyond the perimeter of its upper around the heel to provide both the cushioning runners want and the stability they need.