Nike's latest offering from the NIKEiD lab is the ability to customize your own unique Nike Air Max 90. You can choose from three distinct midsole innovations - original, Lunarlon, or Nike FREE.

Original needs no explanation; Lunarlon gives soft, springy cushion support; and NIKE FREE promotes natural motion with forefoot flex grooves for greater flexibility. Nike Air Max 90 iD launches on January 13 at $135 USD.