Follow the fitting instructions carefully here. Make sure the side up is the side with the nose foam and form the nose foam carefully on the gaps between the nose bridge and the cheeks. When fitted properly, the exhaled air shall go through the exhalation valves and you should have no issues anymore with fog on your glasses.
What should I do if the mask fogs my glasses?
Wed, 17 Feb, 2021 at 9:24 AM