Bill Microfiber Technology Co.,Ltd is an specialize manufacturer in micro-fiber cleaning cloth of digital products. We use the top grade material in the world, that is the Bmt Magic Microfiber."DUSTGO" cleaning cloth has the main characteristics as following:1. Using without extra cleaning liquid.2. 100% non-scratching of the digital sensitive surface.3. The cleaning effect is 10 times better than ordinary cleaner.4. The products have been identified by Switzerland S.G.S Company which is the most authoritative inspection organization.5. The product were made of 100% BMT MAGIC MICROFIBER, Which was 1600 times thiner than human's hair.