Nike Vaporfly 4% Flyknit Ekiden Pack

Four percent more efficient than Nike’s previous fastest marathon footwear, the 2017 Zoom Vaporfly 4% is upgraded with the debut of the Zoom Vaporfly 4% Flyknit sneaker in 'Flash Crimson.' Refreshed with increased lightweight flexibility and breathability, the runner is fitted with ultralight Flyknit mesh, stabilized by a full-length carbon plate and an internal heel design. Energy-returning ZoomX foam cushions each step for a smooth ride.