A full-length Air Zoom unit has replaced the heel and forefoot units in the previous version, sculpted and curving up at the toe box, it ensures the Nike Pegasus 42 Wide feels more energized, and smoother between landing and toe-offs. The fit has been updated to give you more wriggle room in the toes and forefoot for a more comfortable feel, especially as hot feet swell through your run. To help keep your feet cool, a lightweight mesh upper is softer than previous versions for a comfortable, cooling hold. The famous waffle outsole has also been updated, providing traction and flexibility thanks to its high-abrasion rubber with flex groove construction.