What are Guardian caps? See the NFL's latest head protection device - Deseret News
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What are those funny-looking soft caps on NFL helmets during camp?, Sports
NFL's top doctor does not expect Guardian Caps to be worn in games - NBC Sports
Garber Dukes to wear Guardian Caps during football practices
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What are Guardian Caps? NFL's latest padded helmets for added safety
Park High School football blazes safety trail with Guardian Caps
High school football looks to Guardian Cap for head safety
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NFL says positions wearing Guardian Caps saw 52% decrease in concussions
It's time the NFL made Guardian Caps mandatory
NFL introduces Guardian Caps across league to limit number of brain injuries in preseason
GUARDIAN CAP DEBUTS AT TRAINING CAMPS LEAGUE-WIDE