Football helmets don't provide much protection from concussions, study suggests - CBS News
How Much Do NFL Helmets Cost?
$2 Million in NFL Funding Now Available to Help Innovators Create a New, Top-Performing Football Helmet for Submission to the NFL Helmet Challenge
Packers are using high-tech helmets in hopes of lowering concussions - The Athletic
Vicis high-tech helmets take top 3 spots in NFL's annual performance ranking of equipment – GeekWire
NFL hopes to reduce head injuries with helmet experiment
Tom Brady's helmet model among those banned for 2018 - Sports Illustrated
Examining a Safer Option for Football Helmets
NFL looking to introduce new football helmets - Dawgs By Nature
CTE found in 345 of 376 former NFL players studied
VICIS and artefact's football helmet revolutionizes 50 years of stagnant designs
Youth Football Helmet Ratings
NFL helmet maker partners with U.S. Army to research military head injuries - ESPN