Queen's Football utilizing Guardian Caps - Queen's University Athletics
Guardian Cap debuts during minicamps in effort to reduce avoidable head contact
NFL players experimenting with 'Guardian Caps' to prevent head injuries
Guardian Cap Debuts at Training Camps League-wide
Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
NFL introduces Guardian Caps across league to limit number of brain injuries in preseason
More teams practicing with Guardian Caps, Sports
Puffy Guardian Caps Could Reduce NFL Player Concussions
Guardian Cap Results: “Exceeded Our Expectations”
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets
What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear