The Pegasus Premium is an all-rounder designed by Nike for your daily run. With the Pegasus Premium you have a perfect mix of comfort, support and durability. Experience the ultimate performance of the Pegasus Premium every day. Midsole The midsole is made of ReactX foam. Compared to Nike React foam, ReactX is designed to reduce the carbon footprint of a pair of midsoles by at least 43% due to the reduced energy used in the manufacturing process, and to increase energy return by 13%. Zoom Air units are built into the midsole. These absorb shock and bounce back quickly, reducing the stress on your muscles, joints and tendons. You can run faster and jump higher with the Zoom Air Unit because it transfers energy more efficiently. Upper The upper of the Pegasus Premium is made of mesh for good breathability. Outsole The shoe has a rubber outsole and offers good grip and traction while running.