Although it may cover the whole, if you use it in conjunction with a mask, it is fog-resistant so it does not fog, but the inside of the lens gets wet as a whole. Which is better which you get cloudy or get wet?
I use it to prevent sawdust of the woodworking machine from getting into my eyes, but I feel comfortable to fit with it. Just masking will make it cloudy but if you use anti-fogging it will not be a problem.
Glasses Holes that are open up and down are good only on the top. Even though it is a goggle type, when you mask it, air enters through the hole underneath and the eyeglasses become cloudy. I use the hole in the bottom with a tape.
The lip seal fits the shape of the face, there is no inflow of dust from the outside. Naturally my own expiration from the mask's skimmer will not flow and the lens will not cloud. Also, the cloudiness due to sweating from the surroundings of eyes accompanying use under high temperature is minimized by the ventilation holes around the lens. It was unexpectedly easy to use that the left and right viewing angles were wide. I am very satisfied that I can not find anything more.