The Smith No Fog Cloth is exactly what you need if you are wearing a mask due to Covid 19 along with eyewear. Simply give your glasses a polish with the no fog cloth and remain fog free to a good amount of time.
Ideal for year-round use on all types of eye wear, binoculars, rifle scopes and mirrors. For ideal results, breathe lightly on the lens, then gently wipe dry with the No Fog cloth. Always use on eyeglasses if they are being used inside a goggle.