Frequently Asked Questions
Guardian Cap Debuts at Training Camps League-wide
Guardian cap' to prevent head injuries mandated for practices, CFL says
Quotebook Notebook: Jason Kelce remains hungry in Year 12
Why Alabama football players are wearing padded helmets in practice
Football helmet - Wikipedia
NFL players don Guardian Caps, designed to protect from concussion
CFL players adjust to protective helmet caps
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
What is the Q Collar, the device NFL players are wearing around their necks
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post