VICIS has top four helmets in impact testing by NFL, NFLPA
Chargers News: NFL, NFLPA approves first-ever position-specific helmets - Bolts From The Blue
Youth Football Helmet Ratings
VICIS Zero2 Trench Adult Football Helmet - Sports Unlimited
Varsity Football Helmet Ratings
Check out the latest breakthroughs in football helmets
Laboratory Evaluation of Shell Add-On Products for American Football Helmets for Professional Linemen
Seattle Seahawks players talk about their experience wearing new high-tech Vicis helmet – GeekWire
VICIS and Carbon Combine Technologies to Create Top-Rated Helmets - Carbon
The Next Level Football Helmet
Do NFL players have numbers on their helmets? If so, why? - Quora
Coming to an NFL game near you, the Zero1, a helmet that helps guard against brain injuries