If you care kitchen caddy bags 30sif you care certified compostable food waste bags are made from 100 gmo free potato starch in a fully compostable composition these bags are all natural completely polyethylene free and plasticizer free if you care compostable bags are stronger than bags made from corn starch the potato starch used to make these bags come from starch potatoes which are not grown for food but only for starch production these potatoes are too high in starch to be good