Deluxe outfits are similar to what one might find an adult wearing in a play, cosplay, anime cosplay costumes or Renaissance festival. What makes a deluxe adult costume special? The listings all have photos and we really like that the sellers list which cons the costume was worn at. Deluxe Halloween costumes are usually made of better quality materials. For example, cosplay costume most of these sites are selling Nezuko from Demon Slayer because her outfit is (relatively) easy to make and she’s incredibly popular.