Sponge Cloth is excellent for washing and is streak free. Sponge Cloth is the perfect alternative to paper towels because it cleans without leaving the paper towel fiber residue. Sponge cloth can be used on many surfaces-including glass, granite, natural stone without scratching. Sponge Cloth is both reusable and biodegradable. Sponge Cloth is made of cotton and cellulose from wood pulp. Sponge Cloth is easy to clean in washing machine or dishwasher without heat.