Nike Free 4.0 Flyknit is a men's athletic sneaker designed for running and jogging. The shoe features a low-top silhouette with a standard shoe width and Nike Free technology for flexibility and comfort. The shoe is primarily blue with dark grey, black, and polarized blue accents. It has a style code of 631053-014 and is available in UK shoe size 14, US shoe size 15, and EU shoe size 49.5. The shoe was released in 2014 as part of the Nike Free product line.