... % Biodegradable corn starch bags/100% corn starch bags with EN 13432 and ASTM D6400Starch-based material100%biodegradable & compostableEnvironment friendlyOK ... one side,5colors/two sidesCertificate:EN 13432,ASTM D6400,OK COMPOST, Function:good strength,health material.I am NOT a plastic ... have seen in the supermarket, it's made from cornstarch material, which saved the limited oil source, after the use ...