What are Guardian Caps? NFL players sport specialty helmets for 2022 minicamp | Sporting News Canada
Leatherhead to Radio-Head: The Evolution of the Football Helmet | Arts & Culture| Smithsonian Magazine
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AT&T's 5G helmet tech helps Gallaudet football players overcome hearing challenges on the field
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NFL Helmet Challenge Raises the Bar for Helmet Technology and Performance, Awards $1.55 Million in Grant Funding to Help New Models Get on Field Faster
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A football helmet designed just for linemen arrives. Now will it catch on? - The Athletic
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Helmet Safety Unchanged as Injury Concerns Rise - The New York Times
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Guardian Caps, a soft-shell helmet cover, among CFL's new player-safety initiatives | CBC Sports
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