Celebrations and balloons always belong together. A great tip for any children's party. The balloon is made of shiny foil, is suitable for filling with air and helium and can be repeatedly inflated. The balloon is equipped with a safety lock so if you inflate it with air, use a balloon pump, straw or hollow straw (not included) . When filled with helium, foil balloons will last 4-10 days depending on their size and ambient conditions.