Guardian Caps Guardian Sports
Exactly How Dangerous Is Football?
NFL players wear Guardian Caps to reduce head trauma during training camp
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets
New Schutt Helmet: Vengeance (Rev.) – The Concussion Blog
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
College programs take proactive approach to helmet safety, All OU Sports
NFL CMO Dr. Allen Sills explains importance of mandated guardian caps during training camp
Can a Better Football Helmet Save Your Kid's Brain? - Washingtonian
Virginia Tech lab releases first safety ratings for youth football helmets
This might be a dumb question, but why do they wear these extra pads on their helmets for camp but remove them for games? : r/KansasCityChiefs
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Coverage of the NFL in Guardian Caps
Future of NFL safety: Inside Vicis' high-tech football helmet production facility in Seattle – GeekWire