This Dual Sided Microfiber works wonders on a dirty lens. 12.5" x 8.5" size gives you plenty of cleaning surface while being small enough to fold into your pocket. The gray side is a plush pile microfiber great for the first wipes to remove mass amounts off paint of a lens. Graphic side is a smooth weave microfiber perfect to polish a lens and remove any streaks or oil residue from paint.