I had bought these balloons for a wedding in order to be filled with helium. The green is after the balloons are inflated no longer quite as strong but still very nice. When the balloons are filled with normal air holding very well and long. They were still fairly firm for over a week and have barely lost air. Filled with helium they flew after 3 hours is still very good. We have let fly with pink balloons. It just looked great. At home I had a few already filled with helium to sample. They stopped about 12-16 hours until they went to the ground and had taken in the period considerably in volume.
