A mid-range running shoe with an emphasis on comfort over performance is the Nike Air Zoom Pegasus 39. This new model is lighter while keeping the great combination of earlier iterations: exact lockdown, comfortable for extended distances, and notable durability. The stability is provided by the medium-firm feel and good shock absorption support provided by the Nike React foam and Zoom Air units. Transitions from heel to toe are simple despite the Nike Pegasus 39's still-limited responsiveness. What is the Nike Air Zoom Pegasus 39's primary flaw? For warmer weather, its thick upper lacks ventilation. The shoe will continue to excite aficionados of the collection while remaining faithful to the Pegasus line's character.