Unlike your shirttail or a scratchy paper towel, the E-Cloth glasses cloth helps you focus on the task at hand without distracting smudges and removes over 99% of bacteria you'd rather not come face-to-face with. Dry or dampened with water, this super soft microfiber cloth gently removes dirt, fingerprints, smudges and more from lenses and frames without scratching, with just a quick pass or two. How masses of precision-engineered microfibers break up and remove grime without adding chemical cleaners. Keep one in your glasses case.