VICIS ZERO1 Football Helmet Ranks First for Third Consecutive Year in NFL/NFLPA Helmet Performance Testing
VICIS Zero1 tops list in NFL helmet performance testing
Head shape analysis of National Football League Players - Gwansik Park, Lee F Gabler, Ann M Bailey, Nathan Z Dau, Chris Sherwood, Jeff R Crandall, Kristy B Arbogast, 2022
Development and Evaluation of a Test Method for Assessing the Performance of American Football Helmets
Vicis Zero1 Football Helmet Again Ranks No. 1 In NFL/NFLPA Helmet Performance Testing
NFL, NFLPA ban 10 helmet models after failing testing
The NFL's Quest for a Better Football Helmet - Sports Illustrated
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
NFL, NFLPA Release 2020 Helmet Laboratory Testing Performance Results
NFL, NFLPA Release 2019 Helmet Laboratory Testing Performance Results