The mask does indeed prevent steam of specs. but i find it very difficult to manage because the one size is huge.
This mask does all they claim and completely prevents my glasses from misting / steaming up
An excellent and very comfortable fit, and no steamed-up glasses. Thank you.
I bought 2 of these masks. In order for your glasses not to steam up you have to squeeze the nose piece tight.
Only criticism is that it is a bit expensive for what it is.
Great mask but needs to be different colours or just one colour.