Our Blue Merlin cloth uses a high tech microfiber yarn that's extremely strong and generates no particles to stick to your glasses. The dense material has excellent absorption catching and holding on to surface contaniments from your lenses and screens so they get removed and stay that way. Great for use on eyeglasses, sunglasses, reading glasses, laptop screens, iMacs, Macbooks, iPhones, Smart Phones, and touch screens of all kinds, especially tablet and automobile screens. Bundle includes 12 6" x 7" Blue Merlin cloths.