There are ordinary fog wipes and then there is patent-pending FogBlocker. This revolutionary new product designed by biotech scientists is a game-changer compared to older anti-fog solutions. A FogBlocker dry wipe can be used well over 500 times and lasts between 24+ 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 plastic guards and goggles.