About this item • 【Why Foil balloons are better】Our Gold Letter Foil balloons are not as porous as latex balloons, which means they will stay inflated for longer. They feature a nylon material with several thin sheets of metal material over top. • 【Why you should choose foil balloons】Our Letter Foil balloons come in a variety of colors, shapes and styles. The ability to get a specific shape, number or character is one reason why people choose these balloons. • 【Great Decoration Foil Balloon】Foil mylar letter balloons are the ultimate way Whether you’re looking for your child’s favorite movie character or a numbered balloon to celebrate your anniversary someone's birthday, a business grand opening or for marketing a new product at a trade show, you’ll find it in foil balloons. • 【Long Lasting】Our Gold Letter Foil balloons In most environments, foil balloons last 3-7 days. In hotter conditions, you likely won’t get as long from your balloons. When inflated well, these balloons often last approximately one month. • 【Easy To Use】Easy to inflate using the a straw or an air handheld pump ,insert the straw into the inflation tube carefully, Press the self -sealing tail after finishing blowing up , If air leak occurs while inflating, please press the inflatable hole or use tape to assist the automatic sealing of the balloon. • 【Size & Material】16 inch (before blown up). Our Gold Letter Foil balloons are made of good quality aluminum foil film which can be used repeatedly. (Not support Helium) .