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. Breathable, lightweight engineered mesh helps keep you contained. Your foot sits on top of full-length ZoomX foam, Nike’s most responsive foam. It delivers incredible energy return with each stride. 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, 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 has high-abrasion rubber to provide traction.