Nike ZoomX Vaporfly Next% 4 - UnisexA 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 round racing shoe that's trusted from the mile to the marathon. Full Speed A full length carbon fibre Flyplate provides a propulsive, racing feel. More energy return Nike ZoomX foam, our most