I pumped them up with a blow up mattress machine that was in the house mid September they’re are still hanging on the wall and none of them have deflated yet.If I were reading this review, I'd probably chalk my issues up to "user error" and move on. However, I decorate with balloons fairly regularly. They are my preferred decoration of choice because they create a great looking backdrop in a short amount of time and effort. For my son's 21st birthday, I ordered a balloon garland pack, the forty-inch numbers (21), a pack with the inflatable "Happy Birthday" balloons, and these large beverage balloons. These were the only balloons of this type that we had issues with. My son is in college and one of his housemates has a birthday 4 days after him, so I knew that after we used them at my house on the day of my son's birthday, these would go back to his college campus house and be used later in the week to also celebrate his best friend's birthday. In other words, these were not at all meant to be a one day and done sort of decoration. Unfortunately, we had one balloon that completely failed to inflate. Two additional balloons we were able to inflate, but by the end of the evening they were already droopy. Having lost essentially half the pack to low quality, I would not recommend them to others.Easy to inflateEasy to inflate. Good quality for this price.I couldn’t get air in these there wasn’t a hole like most balloons like this and it was a a waste of money for me.Buen tamañoI was only able to use one ballon ! The rest had both sides of the balloons glued together making it impossible to inflate !