The FogKicker Eyeglasses Anti-fog is a microfiber cloth injected with FogKicker formula that keeps your eyeglasses fog free.
Just breathe on the inside and outside of your eyeglasses lenses, and wipe over both sides of the lenses with the cloth as you fog them up with your breath. Full directions on package.
One cloth can be used for 50+ applications. Just make sure not to wash the microfiber cloth as this will wash out the FogKicker inside the cloth... just keep it clean and dry and you're good to go.