Fine copper-threads gently remove even persistent dirt - copper is a soft metal, which does not scratch. It frees pots, pans, and stoves from burned grime, does not leave scratches on enamel and stoves, polishes the sink until it gleams. Double layered for extra strength, extreme long lasting, washable in the washing machine in the washing machine at 60 degrees Celsius (please put in a line sack or sock). Do not use on teflon or similar surfaces. Use wet only. 100% recyclable.