The Sock Dart SP version, known as the 'Infrared' edition, made its debut in 2015. What makes this iteration notable is the distinct red color that completely covers the one-piece upper of the shoe. To ensure a secure fit, Nike incorporated a large midfoot strap that tightens the stretchy mesh material. The shoe features a clean white midsole, adorned with an Infrared mini Swoosh, and a matching forefoot outsole equipped with flex-grooves for enhanced flexibility.