What are Guardian Caps? Shadow Hills football using new device to
Puffy, spongy Guardian Caps could help curb NFL head injuries
NFL players don Guardian Caps, designed to protect from concussion
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NFL hopes to reduce head injuries with helmet experiment
NFL mandates use of Guardian Caps for training camp in 2022
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Guardian Caps leave some NFL players and coaches with concerns
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Unpopular guardian caps could provide false sense of security
NFL Players Experiment With 'Guardian Caps' to Protect Heads – NBC
Garber Dukes to wear Guardian Caps during football practices