Wipes away fog on your glasses anytime, anywhere! A dry type that provides a clear, streak-free finish! Reusable, no need for tissues or other wiping materials. 《Product Description》 3 cloths per pack Cloth size: 115 x 75mm Individual package size: 75mm (W) x 150mm (H) x 5mm (D) Ingredients/Materials: Surfactant, preservative 《Additional Information》 How to use: Breathe on the lens to fog it up, then gently wipe for about 10 seconds. * Unopened, there is no expiration date. The 4-digit number printed at the bottom of the back of the package is the manufacturing date (year and month). Each pack of 3 cloths can be used for approximately 75 pairs of glasses. (About 25 pairs per cloth!) We've listened to customer feedback and adopted a "new special cloth"! Significantly improved wiping feel and clarity! A must-have item for this time of year? 2 packs of 3 cloths each! (150 uses total)