NIKE PEGASUS PREMIUMThe 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 the upper: Breathable, lightweight engineered mesh helps keep you contained.