On their website I couldn’t find any statement about their effectiveness, nor any certification.
Disclaimer
The Unmask is not designed or intended to prevent, mitigate, treat, diagnose or cure any disease or health condition, including COVID-19/Coronavirus. Unmasks are intended for general public use only. They are non-sterile and are not intended for use in any clinical or surgical setting or where exposure to bodily or hazardous fluids may be expected, where the risk of exposure through inhalation is high, or near intense heat or flammable gas. Unmasks are not surgical masks, personal protective equipment, or filtering respirators (such as N95 masks).
So yes, I do have breathing and anxiety issues, but my breathing issues are because I've crappy lungs, and I'd prefer to _not_ be around those who consider my life less worthy than their own.
It isn’t societies job to cater to fully vaccinated individuals who remain terrified of Covid. Such an expectation is what is truly selfish.
But it's not the same as what you have to deal with, genuinely fearing for your life.
As a non-American considering going through the Green Card process and with an American-born daughter, stuff like this dampens my enthusiasm for living here long term. I guess the USA is just a place with an enormous spectrum of opinions...