NFL approves use of helmet designed to reduce concussions for quarterbacks
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NFL and players' union approve helmet designed to reduce QB concussions, NFL
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First QB helmet designed to help reduce concussions approved - Newsday
NFL, NFLPA approve first position-specific helmet for linemen
Three VICIS Helmets Rank Among NFL's Best
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What Pros Wear: What Helmet are the Bosa Brothers Wearing?
Why are NFL players wearing padding on helmets at training camp?
NFL, NFLPA approve first position-specific helmet for linemen
Behold: The First Position-Specific Football Helmet
Helmets go high tech in quest for NFL player safety
NFL rates first ever position-specific helmet No. 2 in lab testing
NYSportsJournalism.com - NFL Testing Approves First QB-Specific Helmet