Do your glasses fog up whenever you wear a face mask? If so, then the Fog Stopper is for you! This amazing product prevents fogging on all lenses, from eyeglasses and sunglasses to safety goggles, swimming goggles and masks, and more! Simply apply 2 drops of the Fog Stopper on the inside of your lenses and gently spread it with a soft glasses cloth or tissue. After letting the glasses air dry for 20-30 seconds, wipe the lenses again and now your glasses will be fog free! This quick and easy tool makes wearing a mask much more tolerable.