I find it overall comfortable for about 3 or 4 hours at a time. It does fog after an hour or 2, but my Deaf clients can still see my mouth movements even when it's fogged. I just take it off every few hours, wipe away the moisture and put it back on.I have a small face and find it more comfortable to fold the fabric above the nose piece under. Easy hack, still seals well.I've ordered them twice.The plastic around the mouth scratch very easily.Good idea just not done wellVery affordable! At $1.00 each! Serves the purpose perfectly! For my condition!It is uncomfortable and no one can see my mouth. I ordered it so my students could see my mouth as I teach a foreign language. They saw only my nose. I wasted $12.01. I really would like some credit as I cannot wear these.It is hard to breathe and it completely fogs up so there's no point of wearing it. Don't waste your money. Also looks different than the picturesNot pleased had to return them. All fogged up while wearing it.Todo muy bien