Guardian Caps are the latest effort to address CTE, football concussion concerns
High school football looks to Guardian Cap for head safety – The Denver Post
The story behind those soft-shell puffy Guardian Caps players have been wearing
New NFL Helmets - NFL Testing Validates Benefit of Guardian Caps
Guardian XT Football Helmet Cap, Men's, White/Silver
Guardian Caps debut at NFL training camps around the league
Staples football pioneers use of 'Guardian Caps'
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games
Bellmore-Merrick athletics debuts new guardian caps, Herald Community Newspapers
Guardian Caps: NFL requires use of helmet cover at training camps to reduce head injuries