Accent your unicorn themed party with this 42" large unique shape Unicorn Rainbow Pretty Pastel foil mylar balloon. The perfect balloon for your unicorn party, this 42" Unique party balloon is great for setting the scene! 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.