interesting - the "Q-collar". FDA-approved but who knows if it works. There was an article about it in the New York Times - apparently it compresses the veins that return blood from the brain a little bit to try to keep more blood in the brain to act as a cushion against concussions. But the research seems pretty sparse.
I don’t actually know. I’ve only hear that it is allegedly something that allegedly helps prevent concussions. One of those weird alternative medicine things I guess.