Guardian Cap Debuts at NFL Training Camps League-wide
NFL says positions wearing Guardian Caps saw 52% decrease in concussions - NBC Sports
The story behind those soft-shell puffy Guardian Caps players have been wearing
NFL CMO Dr. Sills on Guardian Caps Mandate >> Guardian Sports
What are Guardian Caps? NFL's latest padded helmets for added safety
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games
Could Guardian Caps be used during NFL games for player safety?, Pro Football Talk
Guardian Caps: NFL requires use of helmet cover at training camps to reduce head injuries : r/nfl
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
Guardian Caps: NFL requires use of helmet cover at training camps to reduce head injuries : r/nfl
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77