A light, efficient design feels propulsive for all 26.2. The Vaporfly 4 is a lean, mean, mile-eating machine. We trimmed weight in the midsole, outsole and upper from the Vaporfly 3 without sacrificing performance. The result is a lighter, more propulsive all-around racing shoe that's trusted from the mile to the marathon. Full Speed - A full-length carbon fiber Flyplate provides a propulsive, racing feel. More Energy Return - Nike ZoomX foam, our most responsive foam, just got faster. Running from heel to toe, it unlocks even more energy return than before thanks to a slight midsole reduction, giving you a bouncy feel. Engineered Mesh - Engineered mesh offers improved comfort and a disappearing feel on your foot. It helps reduce the weight of the shoe while supplying a more consistent fit. Light Feel - See how the midsole bulges out by the heel? We designed it that way to help reduce weight on the inside of the foot to give you a more stable ride. What's New? - Lighter upper, midsole, outsole. Higher plate angle. Lower heel-to-toe drop Product Details - Weight - Approx. 152g/5.4oz (Women's US 8). Heel-to-toe drop - 6mm.