Eagles players on Guardian Caps: 'We look a little goofy,' but all for safety
Florio PFT] The Guardian Cap apparently works. But if a player asks to wear it in a game, the league would say no. : r/nfl
[Smith] NFL says positions wearing Guardian Caps saw 52% decrease in concussions : r/nfl
Guardian Caps Debut at Training Camps Across the NFL
NFL hopes to reduce head injuries with helmet experiment
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Guardian Caps are the latest effort to address CTE, football concussion concerns
Guardian Caps: NFL requires use of helmet cover at training camps to reduce head injuries
It's time the NFL made Guardian Caps mandatory
NFL hopes to reduce head injuries with helmet experiment
NFL Introduces Guardian Caps At First Week Of Training Camp - The Sports Credential
NFL introduces Guardian Caps across league to limit number of brain injuries in preseason