Guardian Caps The Rundown
Park High School football blazes safety trail with Guardian Caps
Concussions: Can cap keep football players' heads in game
Why the Ticats are wearing those giant helmets at practice
Eagles players on Guardian Caps: 'We look a little goofy,' but all
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play
EXPLAINER: NFL using helmet caps for player safety, research
EXPLAINER: NFL using helmet caps for player safety, research
Staples football pioneers use of 'Guardian Caps'
Could Guardian Caps be used in games? - NBC Sports