A full-length ZoomX midsole provides the ultimate 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 protection 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 keeps you secure. The updated, sleek lacing system is laterally offset with a notched tongue to help relieve pressure on the top of the foot. Runner-informed data was used to create the outsole. It uses that information to place traction where you need it the most, with a pattern that connects to the pavement based on how your foot hits the ground. The result is solid grip from foot contact to toe-off, helping you stay ahead of the competition. Partially integrated tongue delivers a secure fit.