Great question! The difference is that air-filled products / balloons are filled with normal air, hence they don’t float (fly). They’re often delivered on a stick for you to hold. If you want your balloons to float, you would want helium. They’re typically delivered on a string and with weights at the bottom, so they won’t fly away and “stand” on the floor.
Helium-filled balloons usually have a shorter lifespan, you would find the floating times in our product description. Air-filled balloons stay inflated for a longer time.