Excellent advice and after-sales service. Using the no-valve version means the mask is excellent both for fighting Covid-19 and fighting haze.
Zorro Black Air Mask
This is way better than any and all masks I have used to-date. However, it does not seal against my face and my fogged glasses are proof of that. Not a complaint, but an observation. All faces are different, this fits me well, but without tightening the straps until my ears come off, exhaled air will exit from the edges rather than the one-way vent.
I love these masks. They’re the only brand I order. Nothing more to add.