High school football teams go soft in the fight against brain injuries
NFL says positions wearing Guardian Caps saw 52% decrease in concussions - NBC Sports
Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
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
For Giants and the NFL, it's the Summer of Guardian Caps - Newsday
Puffy Guardian Caps Could Reduce NFL Player Concussions
Chicago Bears: Why players are wearing padded helmets
Guardian Caps — Do They Work? - The Indiana High School Football Forum - The Gridiron Digest
Guardian Caps: NFL requires use of helmet cover at training camps to reduce head injuries : r/nfl
The story behind those soft-shell puffy Guardian Caps players have been wearing
The story behind those soft-shell puffy Guardian Caps players have been wearing