Nike Vaporfly Next% 4 is the Latest Generation of Nike's Iconic Raceday shoe – Designed to Deliver Maximum speed and Efficiency over both short and long Distances. With a focus on Further Enhancing the Running Experience, Nike has Adjusted both the Sole's Geometry, Weight, and fit, so you get an even more Balanced and Explosive shoe for Competitive use. The Shoe's Midsole still Consists of the Ultra-light and Energy-returning ZoomX foam in Combination with a Full-length Carbon plate that Ensures a Forward-pushing and stiff Sensation. In this Edition, the stack Height has been Lowered Slightly to 36 mm in the heel and 29 mm in the Forefoot – Providing a more Stable Running Experience Without Compromising the Characteristic Bounce. The upper has also Received an Update: The new Flyknit Atomknit 2.0 Construction Offers both Better Ventilation and a more Precise fit Around the foot.