I have allergies and moved next to a farm field two years ago, and in addition to recent forest fires and COVID spikes, things have been brutal on my respiratory system.
When I started looking for a new mask, I hadn't considered the off-gassing that a lot of products unfortunately have until I started reading some reviews that complained about it. I queried the web for a mask that doesn't, and these came up.
I was pleasantly surprised to see that not only are the materials tested and safe, the fit is absolutely superb. I'm a big guy with a beard (6' 240 lbs) and it's been next to impossible to find a mask that doesn't slip up my chin. The extra flap of material that goes under the chin is not only good for that, it's great for better seal integrity in general.
It's a super comfortable mask. If I had any constructive criticism, it would be to maybe take a look at a thinner material for the nose bridge wire, as the one used is really thick and causes my glasses to sit up off of my nose. But all told, I would still buy and will recommend these to anyone I know.
It takes a lot for me to write a review, but kudos to Unicorn. I wish them nothing but success.