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Puffy, spongy Guardian Caps could help curb NFL head injuries
NFL expands rule against misuse of helmet; Guardian Caps required
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play
Could Guardian Caps be used during NFL games for player safety
Guardian Caps Guardian Sports
Large Bubble Helmets Are Guardian Caps, NFL's New Safety Measure
EXPLAINER: NFL using helmet caps for player safety, research
Guardian Caps - Are the soft-shelled football helmet covers
Guardian Caps leave some NFL players and coaches with concerns
Bill Barrable on LinkedIn: NFL executive hints that Guardian Caps
Hallelujah! 12-Team College Football Playoff Approved – FRANK THE
What Pros Wear: Guardian Caps What are Those Helmet Covers Being
If a player wanted to wear a Guardian Cap during a game, the