Review on O2 Canada Respiratory Protection Reusable: Safeguard Your Breath with Long-Lasting Efficiency by Chad Gravely

I bought two O2 respirators from Revain expecting them to work as advertised and was delighted to find this product. Both failed after going through the instructions with a fine tooth comb. The headband is too long even when set to the extreme position and in general I'm an average height person. Masks that are pressed against the face (I used my hand as the band doesn't help) do not perform their main function: they filter air pollution. I can smell the smoke from the fire like I'm not wearing a mask. This is unacceptable for a mask that filters pollution. My old tattered n95 mask filters out the smoke. Also, the mask is too small for my husband, fitting just under his lip. No response from customer service after a week and no way to return it even though I ordered through Revain Prime. (Edit: I got my money back after complaining about Revain support) Additional details