What is the Q Collar, the device NFL players are wearing around their necks

If you’ve been watching any NFL games recently, you might have noticed some players sporting white (or in some cases, black) horseshoe-shaped collars around their necks. But what are they?
If you’ve been watching any NFL games recently, you might have noticed some players sporting white (or in some cases, black) horseshoe-shaped collars around their necks. But what are they?

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Q-Collar helps Texas guard Audrey Warren hampered by concussions

What is the Q Collar, the device NFL players are wearing around

Increased profile of “Q-Collar” invites further discussion — Concussion Alliance

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What is the Q Collar, the device NFL players are wearing around

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Will This Device Protect Athletes' Brains, or Only Make Them Think It Does? - The New York Times

What is the Q Collar, the device NFL players are wearing around