Our dog waste bags are made of high-quality, plant-based ingredients, such as cornstarch, cassava and other renewable resources. These vegetable compounds contain no genetically modified plant materials. They contain NO NASTY EPI ADDITIVES or polythene plastic, are non-toxic and when placed in a composting facility they break down into water, Co2 and biomass in approximately 90 days, leaving behind no micro-plastics and releasing no harmful chemicals during this process. Our pet waste bag refills are certified, made from biodegradable plant starches. These bags contain no nasty epi additives that release harmful chemicals into the environment.