"I wore this over several days while doing a loft job. It performed well and protected me from dust and fibres. My glasses did steam a little but not excessively - the trick is to breath through your mouth. I would imagine that this would not be a suitable item for everyone, the shape of your face would be a factor in how it works. I got mine for £1.99, but even for £3.99 it would be good value."
"I bought this specifically after reading other reviews and the fact that others says this mask does not steam up glasses. Unfortunately this was completely unusable to me as when wearing it my glasses steamed up within seconds. The seal on my face seamed poor and thus it will have been offering little protection."