The reusable washable sponges from Marleys Monsters are the perfect addition to your eco home, and are a great alternative to disposable sponges which are often made using plastic fabrics. Each sponge is designed to last, and features two sides designed for multifunction cleaning - one side is 100% Cotton Flannel with a polyester mesh for increased absorbency, the other side is cotton terry cloth for firmer cleaning. The sponges are machine washable.