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Chicago Bears: Why players are wearing padded helmets
More padding the issue of concussions and better helmets
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How to choose the correct football helmet? | Forelle Teamsports - American Football, Baseball, Softball Equipment Specialist
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What are those caps football players are wearing?
New helmet material is "better than foam" at absorbing impacts
So what exactly is that black padding on the Syracuse football helmets seen during practice? - syracuse.com
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Chicago Bears: Why players are wearing padded helmets
Why are NFL players wearing padding on helmets at training camp?
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
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