These refuse sacks are completely degradable!
An additive of salts called d2w is added to petroleum based plastic at the extrusion stage, which makes it degradable - it accelerates the natural process of oxidation until the product is no longer a plastic. This can then be used as a food source by bacteria and fungi on land or sea. Amazingly, it will not leave any fragments, methane, harmful residues, or any trace of toxic residues or microplastics.
If you aren't sure and want to try one - buy one sack individually and see what you think!