Is Cocofloss biodegradable? March 06, 2018 19:28 Updated No, Cocofloss is made of polyester fibers that are not biodegradable. Related articles Is Cocofloss recyclable? What makes Cocofloss better? I have a tree nut allergy. Is Cocofloss safe to use? Does Cocofloss contain any PFAS? How long does Cocofloss last?