Football helmets have improved but are far from 'concussion proof' – Orange County Register
Vicis Helmet Nabs Top Ranking Spot After NFL/NFLPA Concussion Safety Tests
The 2018 Vicis Zero1 Wins Top Honors in NFL and NFLPA Testing
NFL helmet safety testing results: Vicis ranks first again for its high-tech head protector – GeekWire
What Pros Wear: Top 5 Best Youth Football Helmets (2020) - What Pros Wear
VICIS on X: It's unanimous. The 2018 VICIS ZERO1 is the Top-Rated and Top-Ranked helmet by Virginia Tech and the NFL/NFLPA, respectively. #ELEVATE / X
Vicis's inside-out Zero1 football helmet could reduce brain trauma
Why Marine City Cardinal Mooney football spent $35,000 on new helmets
The N.F.L.'s Favorite Helmet Maker Is in Financial Trouble - The New York Times