18. Air Tech Challenge II
Year Introduced: 1989
Andre Agassi exploded onto the tennis scene in the late '80s like an LSD-filled piñata. He brought neon colors, acid-wash denim and an epic heavy-metal mullet to a sport normally dominated by various shades of white (and John McEnroe). The Air Tech Challenge II, designed by (who else) Tinker Hatfield, splashed those colors proudly on the heel and toe, and - ironically enough - put tennis shoes on the level of basketball shoes.