The Flash might be fast, but your child has super speed, flight, incredible strength, and much more all in one package! As the cousin of Clark Kent, Supergirl has just as much power as the other famous Kryptonian. The Flash Supergirl Girl's Costume includes a jumpsuit and a cape, and it makes dressing up as this powerful comic book heroine easier than ever. She can soar through the skies of Metropolis stopping bad guys everywhere.