Nike utilizes Vectran material to construct the Flywire upper featured on various Swoosh sports shoes, boasting a remarkable strength five times greater than steel. Initially unveiled in 2008, this innovative Flywire technology not only ensures a stable and flexible fit but also guarantees a lightweight and comfortable shoe experience. By strategically incorporating Flywire materials on the upper of the Legend Trainer 'Signal Blue' model, the necessity for a cumbersome structured overlay is eliminated, effectively enhancing training performance to its maximum potential.