It's become more common in recent years to see NFL players wearing Guardian Caps on the field. Here's how they work.

MIAMI GARDENS, Fla. (AP) — Guardian Caps are soft, protective helmet covers that the NFL authorized players to wear during games this season in an effort to reduce head injuries. Several players have ...

MIAMI GARDENS, Fla. — Guardian Caps are soft, protective helmet covers that the NFL authorized players to wear during games this season in an effort to reduce head injuries. Several players have worn ...

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