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Chicago Bears: Why players are wearing padded helmets
Why are NFL players wearing padding on helmets at training camp?
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So what exactly is that black padding on the Syracuse football helmets seen during practice? - syracuse.com
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Guardian Cap debuts during minicamps in effort to reduce avoidable head contact
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
More padding the issue of concussions and better helmets
Football helmets with outside padding get tryout at Bremerton High School | king5.com
New helmet pads protect Edmond football players during practice | KOKH
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NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
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Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
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