VICIS has top 3 helmets in survey including lineman model
NFL helmet safety rankings: Seattle startup Vicis tops list again with high-tech head protector – GeekWire
NFL, NFLPA ban 10 helmet models
Football helmet - Wikipedia
Vicis Helmets Claim Top Three Spots in NFL/NFLPA Helmet Laboratory Performance Testing
Varsity Football Helmet Ratings
Football helmet - Wikipedia
NFL rates first ever position-specific helmet No. 2 in lab testing
Football helmet - Wikipedia
This Startup's 2 Helmets Are Officially the Safest in Football, According to the NFL
Helmet safety: Inside the complicated equipment industry - Sports Illustrated
Development and Evaluation of a Test Method for Assessing the Performance of American Football Helmets
Varsity Football Helmet Ratings
Varsity Football Helmet Ratings
Helmet safety: Inside the complicated equipment industry - Sports Illustrated