Safe Technology - Specially designed safe technology that won't damage the coating of the glasses lenses, perfect for prescription glasses and regular reading glasses. | Product Benefit: Revolutionary Technology - Eyeglass cleaner with breakthrough carbon microfiber technology that efficiently cleans all types of glasses. | Extremely Effective - A very effective dry-cleaning technology that is substance-free, even used by NASA for space glass cleaning. | Better Vision - Eyeglass cleaner leaves your glasses and sunglasses residue-free, including fingerprints, streaks, smudges, and more, allowing for a clear view | Portable and Convenient - Perfectly sized for on-the-go use, the eyeglass cleaner dimensions are approximately 4x1x1 inches.