*NOTE* LATEX balloons filled with HELIUM (not air) will only stay inflated for around 12-14 hours once inflated, unless coated with a special sealant (HI-FLOAT). Please notify the sales person at time of order if you require balloons to last for any additional time. FOIL balloons will last for around a week if not longer if kept in the right conditions, see our Balloon Care Guide for further information.