Made from the sap of rubber trees, latex or rubber balloons are all natural and 100% biodegradable. The shelf life of a personalized balloon is 6 months to one year. Your custom printed balloons should be stored in a cool dark place until use, away from sunlight and heat which can shorten their lifespan. After the shelf life is expired, the balloons will begin to soften and the rubber rot. So the good thing is that your personalized balloons are 100% biodegradable. You have to be glad about the environmental safety of your promotion, but be wise in your storage and usage of your personalized balloons lest your investment return to the earth before you can utilize it.