These are Made of high quality aluminum foil, thick and auto-sealing, no leaks, can last for days when inflated. Give Your Big Party A Personalized Presentation With Foil Balloons! This Collection Of foil Balloons Features (Pack of 5) Baby Shower Foil Balloons Party Decoration Kids Girl Balloon (Multicolor), So You Can Mix And Match. Whether You'Re Celebrating A Shower Party, welcome party, These Shining foil Balloons Are Perfect For Your Celebration. Mix And Match With Coordinating Foil And Latex Balloons, Polka dot balloons & balloon accessories