The Vaporfly 4 Proto road racing shoes feature a light and efficient design. The weight has been trimmed in the midsole, outsole and upper without sacrificing performance. They feature a full-length carbon fiber Flyplate for a propulsive feel and Nike ZoomX foam. The engineered mesh offers improved comfort and a disappearing feel. The midsole bulges out by the heel to help reduce weight on the inside of the foot. The heel-to-toe drop is 6mm. These Nike sneakers weigh approximately 152g/5.4oz (US 8).