EUC Worn once Give strength to your step with the Nike Air Zoom Pegasus 37 shoe. Ensuring the fit loved by the runners. The shoe is equipped with a brand new cushioning unit on the forefoot and foam for maximum responsiveness. The result is a durable and lightweight shoe designed for your everyday runs. Nike React foam in the midsole for lightness. elasticity and strength. More foam means more cushioning. No bulk. The Air Zoom unit in the forefoot is twice as large as previous versions. thus offering greater elasticity at every step. It is closer to the foot for better responsiveness.