I LOVE these sponges! I will never use any other type, unless they stop selling these! Not only do I feel better about not throwing away so much plastic products when I change out sponges, but I don't have to throw sponges out as often. These natural finber sponges stay cleaner for soooo much longer! They never start smelling rotten like most synthetic fiber sponges do. If you've ever had issues with your songes smelling really bad before they need to be thrown out, try these out! I have literally a whole Costco-sized box full after trying them out for the first time.