Happy 21st Birthday Groovy – Foil Balloon 17 ” Helium Savers XL®. At 17″, they are only 4% smaller than standard 18″ balloons, but you’ll use up to 20% less helium. Made with Anagram’s XtraLife® film so they retain helium 3-5 times longer. Up to 20% Helium Saving, UK Lead Design, Same Anagram Quality, Smaller Packaging – Save space.
