These poop bags are made from plant matter such as corn, vegetable oils, and compostable polymers, making them 100% compostable through its OK Compost Home and OK Compost Commerical certifications. These bags turn into carbon dioxide and water at the end of their life cycle. Includes 4 rolls = 60 bags. Perforated for easy tearing, these bags are large (9"x13"), silky smooth, and made from doggie leash dispensers.