For glass that's crystal clear and sparkling bright use our glass clean system microfibre cloths and just add water. The pack contains two microfibre cloths, simply dampen one cloth and use wet to remove dirt and grime build up and use the other cloth dry to polish glass and mirrors to a gleaming smear-free shine. Wet use: 85percent polyester and 15percent Polyamide; Dry use; 80percent polyester, 20percent polyamide. Always read label. Both cloths are machine washable.