45" Jurassic World T-Rex Foil Mylar Party Balloon - INCLUDES SELF SEALING VALVE - Self-sealing valve prevents the gas from escaping after it's inflated FILL WITH HELIUM OR AIR - Inflate balloon with helium using a foil balloon inflator or with air using a balloon hand pump Balloon arrives uninflated Mylar/ foil balloon Balloons should always be weighted and never released into the air Always dispose of balloons properly