Guardian Caps are the latest effort to address CTE, football
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NFL's use of Guardian padded helmet caps in camp draws support and
Guardian Cap: What are and why the NFL asks this safety measure in
The story behind those soft-shell puffy Guardian Caps players have
NFL training camps: Guardian Cap players are wearing over helmets, why
The safety story behind the unusual helmets NFL players are
NFL executive hints that Guardian Caps could eventually be worn in
NFL hopes to reduce head injuries with helmet experiment – The