Guardian Caps debut at NFL training camps around the league
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games
What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear
Park High School football blazes safety trail with Guardian Caps
What are Guardian Caps and how are they helping football teams?
What are those funny-looking soft caps on NFL helmets during camp?, Sports
Guardian Cap Debuts at Training Camps League-wide
NFL Introduces Guardian Caps At First Week Of Training Camp - The Sports Credential
Eagles players on Guardian Caps: 'We look a little goofy,' but all for safety