Naachiin 2 I tried wearing it with a mask while commuting to work and my breath kept fogging up the glasses. Taking off the glasses was ineffective (and defeated the purpose of protecting my eyes). When I kept the glasses on, my breath eventually condensated on one eye and I could see through the streams of water on the glass but the other eye remained foggy. I ended up being half blinded for much of my commute so I gave up on using it.