Window cleaning, mirror cleaning, stainless steel, chrome, granite, marble and all other shiny surfaces. Superior cleaning of all glass (for electronic devices, please use the Personal Electronics Cloth). Use this cloth to clean all your glass surfaces and add a final polishing touch to most hard surfaces. e-cloths give a fantastic chemical-free clean using just water and a cloth. If you take care of them they will last for years. e-cloths work so well that you will get a lint-free, smear-free clean with just water. Window cleaning and mirror cleaning with a Glass & Polishing Cloth requires less effort yet provides a more thorough clean. Save money by reducing the use of paper towels and chemicals. e-cloths come with a 300 machine wash guarantee giving you years of cleaning performance and savings. 80% polyester / 20% polyamide.