There are ordinary fog wipes and then there is patent-pending FogBlocker. This revolutionary new product designed by biotech scientists at the University of Massachusetts is a game-changer compared to older anti-fog solutions. A FogBlocker dry wipe can be used well over 500 times and lasts between 48-72 hrs per wipe! Its ultrafine microfiber cloth can be safely used on any lenses including those that are coated. You can even apply it on all your PPE plastic guards and goggles. With the current use of PPE masks, FogBlocker is the perfect solution for you!