The Air Tech Challenge 2 revolutionized the concept of tennis shoes by introducing a mesh and synthetic leather upper that guarantees longevity, while an external molded heel counter enhances stability and comfort. In 2014, Nike launched the model's 'Kumquat' colorway, which showcases a vibrant orange Swoosh and speckling that contrast beautifully with the tonal white base. Additionally, subtle yet striking light blue and orange accents can be found on the white Air midsole, adding a touch of uniqueness to the design.