The Nike Air Jordan 13 Retro Doernbecher was designed by John Charles, an 11-year-old boy with Crohn's disease. The design combines a black snakeskin-like upper with emerald green patent overlays and Volt laces. Details of John's personal life include his calcium number, the seven pills he takes a day to manage his condition and the "Crohn's" on his sole. Pink accents highlight the collar and outsole of the sneaker.