GUPPYFRIEND is a patented microplastics solution created in Germany, that filters out the tiniest microfibers released from textiles during washing that ends up in rivers and oceans. The self-cleaning fabric bag is untreated, undyed, does not contain any additives, and is made of a specially designed micro-filter material. Simply collect the fibers at the end of the wash cycle and dispose of them properly. Do your part to save our waterways from plastic pollution!