Ultra-responsive, light foam offers next-level energy return. Take responsive cushioning to the next level with the Pegasus Plus. It energizes your ride with full-length, superlight ZoomX foam to give you a high level of energy return for everyday runs. And a stretchy Flyknit upper conforms to your foot for a seamless fit. Flyknit Upper The Flyknit upper has perforations to help reduce the weight of the shoe and make it more breathable. ZoomX Midsole Ultra-responsive ZoomX foam midsole delivers Nike's highest energy return. Reliable Traction High-abrasion rubber on outsole provides traction.