A Latex Balloon will float for 12-18 hours, but if treated with Ultra Hi-Float, they can remain floating for days. Foil balloons will float for weeks, but they will begin to lose their helium and look soft before they ever drop to the ground. Holographic balloons will stay fully inflated for several days, while balloons made with Anagram’s XtraLife technology (Note: Holographic balloons are not made with XtraLife technology) can look fully inflated for weeks. Whichever foil balloons you are considering, they will float for weeks at a time.