Not a face mask, but this weight-loss device uses magnets to lock your jaws, preventing you from eating.
A weight loss device uses magnets to lock the jaw shut, restricting users to a liquid only diet. Researchers say it's an 'attractive alternative to surgical procedures.'
Not a face mask, but this weight-loss device uses magnets to lock your jaws, preventing you from eating.
There’s a patent for one that was filed in the 1980s.