Good in theory.  Not so great in practice.
I was so hoping these mask brackets would solve some of my problems with masks fitting well enough to protect, but also allow some comfort and easier breathing.  Sadly, didn't happen.  If I even opened my mouth a little, it would cause the mask to pull off my nose (not good). It also caused gaps at the sides, top and bottom of the mask which allows my breath to escape from the mask.  Perhaps if they were larger and flatter it might work, but right now? Not so much.
Rating: 2 stars