If You Care Compostable Garbage Bags are made from potato starch from non-GMO starch potatoes blended with a certified, fully compostable polymer. Potato starch has a higher percentage of amylopectin than either corn or wheat starch. Amylopectin gives starch its structural integrity, so it helps make If You Care Compostable Trash Bags stronger than bags made from corn starch. The potato starch comes from starch potatoes, which are not grown as a food source, but only for starch production. These potatoes are too high in starch to be good for food. Therefore, there is no diversion from food supplies. In addition, to produce the same amount of starch from these potatoes as from corn requires 40% less land. Other compostable bags are made from corn which requires more water, but potatoes require no irrigation, and need only normal rainfall. If You Care Compostable Trash Bags are completely polyethylene free and do not contain plasticizers. These Tall Kitchen bags hold nearly 50 litres, ideal for compostable waste.