Padded Helmet Shell Covers in American Football: A Comprehensive Laboratory Evaluation with Preliminary On-Field Findings
Vicis Helmet Nabs Top Ranking Spot After NFL/NFLPA Concussion Safety Tests
Tom Brady no longer allowed to play in preferred helmet
NFL awards 4 projects in helmet safety development program – The Denver Post
NFL Testing Validates Benefit Of Guardian Caps - Sports Biometrics Conference
Vicis high-tech helmets take top 3 spots in NFL's annual performance ranking of equipment – GeekWire
Study shows 99.5% of NFL players wore top-rated helmets - ESPN
What Pros Wear: Top 5 Helmets Rated by the NFL & NFLPA - What Pros Wear
NFL safety: How VICIS' position-specific helmets have become all the rage - The Athletic
VICIS Zero1 tops list in NFL helmet performance testing
NFL safety: How VICIS' position-specific helmets have become all the rage - The Athletic
NFL, NFLPA Release 2020 Helmet Laboratory Testing Performance Results
NFL awards grants to four projects in helmet safety development program - ESPN
NFL, NFLPA approve first position-specific helmet for linemen
Helmet Innovation: More and Better Choices, Fewer Concussions