Guardian Caps Guardian Sports
Chicago Bears: Why players are wearing padded helmets
What are Guardian Caps? Shadow Hills football using new device to reduce head injuries
Guardian Caps leave some NFL players and coaches with concerns: 'You feel like a bobblehead'
These puffy helmet caps are the next big thing in NFL player safety, National Sports
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
NFL training camps: Guardian Cap players are wearing over helmets, why
NFL Mandated Guardian Caps: Controversial Change - Sports Illustrated Seattle Seahawks News, Analysis and More
More padding the issue of concussions and better helmets
NFL says Guardian Caps reduced concussions by more than 50%
Coverage of the NFL in Guardian Caps