The Pegasus Premium supercharges responsive cushioning with a triple stack of our most powerful running technologies: ZoomX foam, a sculpted Air Zoom unit and ReactX foam. It’s the most responsive Pegasus ever, providing high energy return unlike any other. With a lighter-than-air upper, it decreases weight and increases breathability so you can fly faster. Engineered Mesh on Upper Breathable, lightweight engineered mesh helps keep you contained. ZoomX Foam Your foot sits on top of full-length ZoomX foam, Nike’s most responsive foam. It delivers incredible energy return with each stride. Full-Length Air Zoom Cushioning The full-length Air Zoom unit offers our optimal level of springiness underfoot, unlocking a level of speed and responsiveness that’ll put pep in your miles. ReactX Foam Foundation ReactX foam, 13% more responsive than previous React technology, sits at the bottom of the ZoomX foam and Air Zoom cushioning. It offers a smooth and balanced ride. Modified Waffle Outsole Modified waffle outsole has high-abrasion rubber to provide traction. Style #: HQ2593-004