Queen's Football utilizing Guardian Caps - Queen's University Athletics
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
NFL medical director wants better solutions to concussion cases
Guardian Cap - Soft-Shell Protective Helmet Cover : Football Helmets : Sports & Outdoors
Bombers set to don Guardian Caps” on helmets at training camp
EXPLAINER: NFL using helmet caps for player safety, research
What's with padded helmet caps teams are wearing
More teams practicing with Guardian Caps, Sports
Guardian Caps a fit for Park Wolfpack - Cottage Grove Journal
John's Journal: Park Football Team Is All In On Concussion Safety, News