The balloons will not pop unless punctured. However, over time some balloon colors (like red) may fade a little depending on the product line and climatic conditions. We put the lifespan at 6 months because about that time the balloons tend to accumulate dirt and other outdoor grime on their surface, deteriorating the original sheen/brilliance of the balloon and we feel should be replaced. They will stay shiny as long as the surface is relatively clean.