Year Released: 1992

The Air Tech Challenge IV was the last Agassi shoe on acid and most people just call it the Agassi. Following on the heels of fluorescents and hot lavas, the Air Tech Challenge IV incorporated a tie-dye style print that showed up not only on the uppers, but was also echoed on the midsoles. After this shoe, Nike really switched gears in the Agassi collection and focused less on whyling out and more on tennis. Agassi also went bald (or un-touped. . . still not clear to me). Point is he started to look a lot more like Bob Newhart than Tommy Lee, and his shoes got a lot more businesslike too.