This might be a dumb question, but why do they wear these extra pads on their helmets for camp but remove them for games? : r/KansasCityChiefs
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets
Guardian Caps Guardian Sports
Guardian Caps: Why some NFL players are wearing them in training camps
Giants react to NFL's new 'Guardian Caps' at training camps - Big Blue View
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Packers Coach Matt LaFleur Questions Protective Guardian Cap - Sports Illustrated Green Bay Packers News, Analysis and More
The safety story behind the unusual helmets NFL players are wearing this summer - OHS Canada MagazineOHS Canada Magazine
Get A Load Of These Big Dumb Helmet Helmets
NFL players wear Guardian Caps to reduce head trauma during training camp
What's with padded helmet caps teams are wearing