Costume

Costumes (コスチューム) refer to distinguished outfits worn by Heroes and Villains.

Overview
Heroes often need specific battle wear that is needed to fight and use their Quirks more efficiently. At U.A. High, students are required to send a report on their Quirk and body specs so that an affiliated company may take that information and make their ideal costumes. Students are also able to send in specific requests for their costumes, such as its shape or devices that can amplify their Quirk abilities or weaken its drawbacks.

Heroes can change their costumes throughout their career or use several costumes at once. For example during Winter, when their normal costumes aren't suitable for the environment, they can get an additional one.

Villains may also use costumes as well, although due to legal restrictions, those tend to be obtained through the black market. Giran is known for dealing with illegal costume transactions in the underworld.