This shoe can handle any pace you run, whether it's a moderate 5K run or a long run. Go for a completely new running experience with this all-round running shoe! Midsole The midsole of this shoe has a Zoom Air Unit that absorbs shock and rebounds quickly, putting less strain on muscles, joints and tendons. Zoom Air Units deliver faster, more efficient energy transfer so you can jump higher and run faster. 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 strap around the midfoot ensures a fit that follows the shape of the foot, for arches of all sizes. 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. The Nike Air Zoom Pegasus 41 is the all-rounder that will boost your running experience!