It's all about speed and performance! Your updated Nike ZoomX Streakfly 2 running shoe sheds over 30 g from the previous model (wow!), and with the upgraded Peba ZoomX foam, you get more energy return and less weight. The full carbon fiber plate replaces the plastic midfoot shank, giving you extra stiffness and propulsion to power through your runs. A perforated outsole design delivers killer traction without bulk, and the reduced 4 mm heel-to-toe offset helps you run faster and more efficiently on your forefoot. Add in a new breathable mesh upper, and your ZoomX Streakfly 2 is an actual bullet.