The Pegasus 42 features responsive cushioning designed for daily road runs. A curved, full-length Air Zoom unit and a React X foam midsole provide a propulsive sensation with every stride. The silhouette includes an updated fit with increased space in the forefoot and toe box. full-length Air Zoom unit React X foam midsole lightweight breathable mesh high-abrasion rubber waffle outsole with flex grooves wide toe box with increased toe spring