Helmet safety: Inside the complicated equipment industry - Sports Illustrated
Built By Data: NFL Helmet Innovation
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Football helmet with liquid padding may prevent concussions
Helmet market, with deep Detroit ties, in arms race
The Football Helmet Just Got the Biggest Redesign Since the 1960s--and It's Coming to the NFL Next Season
Football helmet with liquid padding may prevent concussions
Future of football safety could come down to research in Riddell's suburban Chicago office