Padded helmet cover shows little protection for football players - Scope
Wes Welker's safety precaution brings out the thick-headed jokesters
Detroit business Xenith wins $496,500 to help improve NFL helmet safety
14 Broncos players to participate in the NFL's international helmet decal initiative in Weeks 4 and 5
Leatherhead to Radio-head: The Evolution of the Football Helmet, Arts & Culture
Guardian Cap: What are and why the NFL asks this safety measure in helmets
High school football looks to Guardian Cap for head safety
New discovery supports reusable helmet padding, MSUToday
NFL safety: How VICIS' position-specific helmets have become all the rage - The Athletic
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN