3 PC Anti-Fog Lens Cleaning Cloth Multi-Use Reusable Up To 400-600 Times! Each cleaning cloth is safely stored inside the aluminum plastic bag, which will keep the cloth clean and keep the anti-fog function at max level before final customer opened it. Using the top quality machine and material, by following our instructions, the fog free effect will last 24-72 hours. Reusable up to 400-600 times! By applying new technique, our anti-fog cleaning cloth is completely dry just as regular cleaning cloth. This removes the limitation and restriction of exporting or importing, easier to purchase and deliver. To keep the anti-fog function valid, please do not wash the cloth. Recommended to replace with new cloth every 3 months. We promise to use only the best quality material and strictly follow the highest standard production procedures.