Cartoon Character Hello Kitty Theme Foil Balloons for Party Decoration - Pack of 5 Expertly decorate your party with this pack of 5 Cartoon Character Hello Kitty Theme Foil Balloons. These high-quality balloons add a touch of fun and playfulness to any event. The iconic Hello Kitty design is perfect for all ages and guaranteed to bring joy and delight to your guests. Floating Time (Helium)The foil balloons, filled with helium, will stay full for 2-5 days. They may float for longer but will start to appear more deflated as they lose helium.