No matter what pace you run - a 5k or a long run - you can rely on the Air Zoom Pegasus shoe. Experience the perfect balance between cushioning and responsiveness with this all-round running shoe! Midsole A Zoom Air Unit is built into the midsole of this shoe, which absorbs impact and then rebounds quickly, reducing the strain on muscles, joints and tendons. Zoom Air Units allow you to run faster and jump higher because they transfer energy more efficiently. 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 in the manufacturing process, and to increase energy efficiency by 13%. Upper The shoe will hug your foot with an implemented midfoot strap for a firmer, yet smoother feel. Outsole The rubber outsole has Nike's iconic waffle pattern that provides grip on dry and wet surfaces. Flex grooves provide extra flexibility in the forefoot to aid in a smooth walk. Start your run with the Nike Air Zoom Pegasus 41 and pursue your goals!