The versatile Nike Air Zoom Pegasus 41 delivers consistent comfort, an ideal all-round running shoe for your daily run. Take on your running challenge with the Air Zoom Pegasus 41. Midsole The midsole of this shoe is made of ReactX foam. ReactX is a light, firm foam for a smooth, responsive ride with much less impact. With 13% more energy return and 43% less carbon emissions than regular React foam. Zoom Air Units are incorporated into the midsole. These absorb shock and bounce back quickly. This reduces the strain 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 mesh upper makes the Air Zoom Pegasus 41 very breathable. Outsole With a rubber outsole, the shoe provides good grip and traction while running. The forefoot has extra flexibility due to the flex grooves in the outsole and this ensures a smooth way of walking. The rubber outsole is provided with Nike's iconic waffle pattern. This contains honeycomb studs that provide grip on both dry and wet surfaces.