The Safest Football Helmet Is Not Yet a Hit in the NFL - WSJ
The NFL calls Vicis Zero1 helmets the safest yet
Is It Time to Retire the Football Helmet? - WSJ
The NFL calls Vicis Zero1 helmets the safest yet
Helmet safety: Inside the complicated equipment industry - Sports Illustrated
How New Helmet Technology Will Make the NFL and NHL Safer, News, Scores, Highlights, Stats, and Rumors
N.F.L. Will Allow Six Social Justice Messages on Players' Helmets - The New York Times
What are Guardian Caps? NFL's latest padded helmets for added safety
How football helmets fail to protect against some of the most dangerous hits in the game - The Verge
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Football helmet, American Football Wiki
How Football Tech May Change the Game for Head Injuries - WSJ's The Future of Everything - WSJ Podcasts