The React foam is not quite as bouncy as the ZoomX foam found in the Vaporfly and the Nike ZoomX Invincible Run and certainly not as soft as the bubbly Nike Joyride Run Flyknit, but for training purposes over moderate distances, the React is probably the best compromise between performance and longevity. These air pockets are combined with the resilient yet soft Nike React foam which I really liked in pretty much every Nike running shoe I tried so far, including the Nike React Infinity Run. You have the forefoot Zoom Air air pockets providing propulsion and more stability, compared to the full length Zoom Air units found in previous models prior to the Peg 37. If even the manufacturer claims that the updates are small, you can rest assured they really are. The new Nike Air Zoom Pegasus 38 “has subtle updates to fit in the midfoot and brings back the forefoot Zoom Air unit from the Peg 37 for the right touch of springiness underfoot”, according to Nike (opens in new tab). I will be referring back to the Peg 37 quite a lot here so please bear with me.

(Image credit: Future) Nike Air Zoom Pegasus 38: the tech

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