Bring your Spider-Man party to life with this squared Spider-Man Happy Birthday foil mylar balloon! This Anagram balloon features Spider-Man and is perfect for using in a Spider-Man themed bunch of balloons or room decor. Pair with some of our other Spider-Man foil mylar and latex balloons for a great design! This balloon includes a self-sealing valve, preventing the gas from escaping after it's inflated. The balloon can be inflated with helium to float or with a balloon air inflator. Balloon arrives uninflated.