Product Name: Biodegradable Vest Shopping Bags Our Biodegradable shopping bags are 100% compostable bags, a perfect substitute for traditional plastic bags. It comes from corn starch + PBAT, which can be degraded within 180 days in an industrial composting environment. Our plastic bags have a shelf life of 9 months to a year, depending on temperature and humidity. All our bags have passed the American (ASTM D 6400) and European (EN13432) standards for compostable and 100% biodegradable certification. Our T-shirt bags expand to hold most groceries or small goods. An excellent option for small shops and supermarkets.