Even if the contents of your trash bag are completely compostable, the entire package may not be. By using compostable bags you can do even more to protect the environment. Bio-Star liners meet the ASTM D6400 standards for compostable plastics for use in commercial facilities. BioStar liners have been tested and certified by the Biodegradable Products Institute in conjunction with the U.S. Composting Council. Only tested and authorized products are authorized to use the BPI Compostable label. 100 percent compostable Meets ASTM D6400 standard for compostable plastics Furnished on coreless rolls Printed with the BioStar logo and ASTM D6400 certification Available in five of the most commonly requested sizes