Disguise Embrace your inner bad guy when you wear this neon green Billie Eilish Classic costume. Costume features one of Billie's most iconic looks with neon green oversized top and shorts with duh and bad guy graffiti writing, face mask and green head wrap. Disguise is a leader in the Halloween industry creating innovative and trend setting costumes and accessories. Its team is comprised of a group of gifted in-house designers, sculptors and graphics artists from various creative backgrounds including Hollywood movie sculpt design, the fashion industry and gallery-showcased fine arts.