The Nike Pegasus Premium carries you through your runs with game-changing cushioning. Featuring a triple-stack of cutting-edge Nike technologies, the Pegasus Premium debuts a full-length Air Zoom unit sandwiched between ZoomX foam and ReactX foam. The result is a seriously responsive and energetic ride. Plus, the feather-light upper feels cool and sleek with a tried and true Pegasus fit runners everywhere have come to love. Details: Upper: A stretchy and breathable circular-knit mesh upper gives you a secure fit and keeps your feet cool mile after mile.Midsole: ZoomX foam directly underfoot provides ultra-light, springy cushioning for a smooth and energized ride. A full-length sculpted Air Zoom unit, shaped to your foot, propels you forward with supercharged responsiveness. ReactX foam is 13% more responsive than previous iterations while adding durability and a reduced carbon footprint thanks to its sustainable manufacturing process. Outsole: A modified waffle-inspired outsole uses high-abrasion rubber for traction and durability.