2020 Helmet Testing Results ⎮ Who Scored Best & Worst?
Vicis high-tech helmets take top 3 spots in NFL's annual performance ranking of equipment – GeekWire
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
NFL Releases Helmet Laboratory Testing Performance Results
Helmet Laboratory Testing Performance Results
Heads Up! New helmet getting tryout at NFL minicamps
The Quest for a Better Football Helmet
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Will the NFL's Blitz for Position-Specific Helmets Pay Off?
Top-testing helmet being used by small number of players
NFL, NFLPA ban 10 helmet models