This Nike Air Zoom Pegasus 37 A translucent upper has the look of speed and is made to help your foot while you run. Mesh details throughout promote ventilation. Nike React foam at the midsole is lightweight, springy and durable. More foam means better cushioning without the bulk. An Air Zoom unit at the forefoot is twice as large as previous versions, delivering more bounce with every step. A midfoot band adapts to the size of your foot, keeping you comfortable and secure with every step.