The Finer Details A full-length ZoomX midsole provides optimal lightweight responsiveness. The foam stack heights are lower than the Vaporfly, saving weight and giving you a more aggressive feel. It results in a shoe so light, it disappears on your foot while still giving you the responsive cushioning of ZoomX foam, helping you reach your fastest pace throughout the turns and accelerations of any race. An ultra-thin knit upper is light in weight while still providing the support you need for racing. Extra reinforcement in the forefoot helps keep you secure. The updated, sleek lacing system is laterally offset with a notched tongue to help relieve pressure on the top of the foot. Partially integrated tongue delivers a secure fit. Nike Mens ZoomX Streakfly