Launch into an out-of-this-world birthday celebration with this fun 17" Blast Off Birthday Balloon & Latex Set by LOONBALLOON! This exciting set features a festive 17-inch round foil mylar balloon with a "Blast Off Birthday" message, perfect for any space or alien-themed party. The set also includes 4 coordinating latex balloons to complete the cosmic atmosphere. Made from high-quality materials, the balloons can be inflated with helium to create a dazzling floating display or with air for hanging (balloons arrive uninflated).