The ZoomX VaporFly NEXT% 'Sail' is outfitted in an understated color scheme that allows the running shoe’s performance benefits to take the spotlight. They include an upper made with Vaporweave, an airy material that’s lighter than Flyknit, and a full-length curved carbon fiber plate embedded in the Nike ZoomX foam midsole, scientifically proven to generate enhanced energy through rigorous testing at Nike’s Sport Research Lab.