Good gosh. So this "Elon Mask" concept is essentially a publicity grab by the British car leasing company that commissioned the "design." Supposedly inspired by what a mask designed by Tesla would look like, here's how it's supposed to work:
My analysis of the features:
Heavy chin piece strengthens and tones your neck muscles.
Top headband is designed to fit well; all you have to do is shave your head.
The rear neckband apparently stays in place due to an anti-gravity insert.
It might seal at the bottom with thick enough foam, but there's no way the mask portion seals at the top, and the eyepiece is of course open at the top. But never mind that--look at the pretty lights on the neckband!