Our Calyptus Cloth uses a technologically advanced ultra fine Japanese microfiber yarn that's extremely strong and generates no particles to stick to your glasses. The ultra dense material has incredible absorption and its honeycomb matrix design catches and holds on to surface contaniments from your lenses and screens so they get removed and stay that way. The absorption of this cloth is so great that there's no need for spray cleaner, or soap. Calyptus Cloth is like nothing you've used before. 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 like your Tesla may have. Bundle includes six extra large 6" x 7" Calyptus Cloths. Here's the science behind Koala Kloth: The special yarn used for this wiping cloth is 0.1 denier, an ultrafine microfiber. This filament is very fine, strong and generates no particles. The wedgeshaped polyster at the cross section together with the core nylon fit the surface of any objects and gather dust efficiently. Excellent cleaning performance with just a light wipe. The special high density treated knit fabric means extremely good absorption by the total filament surface area. Excellent durability after washing. Soft touch that won't harm delicate surfaces. Excellent water and oil absorption. After knitting with a special gauge knitting machine Koala Kloth is shrunk with a proprietary technology that makes fabric construction highly dense by reducing the surface to 40 percent of its original size. One gram of Koala Kloth has a filament surface area of 25,700cm while other products typically have 8,500 or less. The larger the area, the more efficiently the wiping cloth captures particles. Most synthetic fibers do not absorb water, but Koala Kloth's highly dense construction has a capillary effect which does.