Material: ENA's pet waste bags are made from plant starch. It is Compostable, renewable, sustainable, leak proof, non-toxic. Uses and Storage: Great for dog poop, cat litter, etc. It fits most dispensers in the Market. Store ENA's compostable pet waste bag in a cool, dry place, avoid direct sunlight and excessive heat. Please use the bags within one year. Composting: All ENA's Resealable bags meet ASTM D6400 standard, it can be fully composted in industrial facility within months. Earth's Natural Alternative's mission is to provide earth friendly alternative daily products. That is better for you, better for the earth.