Mostly on Instructables, Cosplay forums and YouTube. Amazon’s Choice. Adult Tron Hoodie Jacket Legacy Sam Flynn Quorra Cosplay Costume. The term also was traditionally used to describe typical appropriate clothing for certain activities, such as riding costume, swimming costume, dance costume, and evening costume. Before the advent of ready-to-wear apparel, clothing was made by hand. This general usage has gradually been replaced by the terms “dress”, “attire”, “robes” or “wear” and usage of “costume” has become more limited to unusual or out-of-date clothing and to attire intended to evoke a change in identity, such as theatrical, Halloween, and mascot costumes.