Guardian Cap Debuts at Training Camps League-wide
Eagles Training Camp Practice Notes
Australian Philadelphia Eagles NFL star Jordan Mailata calls bizarre-looking safety gear 'fake news'
Kenny Pickett Changed Helmet After Second Concussion: 'I Definitely Want To Be Safe' - Steelers Depot
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Helmets – The Concussion Blog
Smith] NFL says positions wearing Guardian Caps saw 52% decrease in concussions : r/nfl
NFL: Concussions dropped by more than 50% among players who wore Guardian Caps during summer
CFL introduces mandatory extra helmet protection for multiple positions. As well as other new health & safety measures. : r/sports
Guardian Cap debuts during minicamps in effort to reduce avoidable head contact