microfiber, and You can use on any smooth, non-porous surface, can be used on glass, window,, car windshields, and even stainless steel These are the microfiber cleaning cloth for car to get you want an all purpose cleaning towel that scoop up your messes, oil and liquids Good water absorption, use this cleaning cloth to wipe the glass without leaving unsightly water marks, and easily get a clean without marks Performance, will not lint, scratch, pill,, shed or bleed like a thin, cheaply made microfiber towel for car