Balloons are made of rubber. The main reason why balloons don't explode is the quality of rubber balloons. Several key points are: 1, the balloon is not aging, has good elasticity, and has a heavy rubber smell after unpacking. 2, the balloon texture is uniform, that is, thick and thin, and there can be no pores. 3. The storage condition after inflation is that the temperature is decreasing and there is no wind. 4. Use it where the temperature is gradually rising. Be careful not to blow the balloon too full. If it is a balloon filled with other gases, it must be carried out under the guidance of professionals. To ensure the safety of personnel.