Take your workouts to even faster speeds with the lightweight, supportive Train Fast Flyknit. Flyknit constructed upper features Flywire tech for natural movement and flexibility. 5/8 collar for a supportive, sock-like fit. Flywire cables add even more support in key areas. Injected unit sole provides lightweight cushioning. Lightweight carbon fiber plate provides elite responsiveness. Rubber outsole traction pattern for aggressive grip.