High school football looks to Guardian Cap for head safety
EXPLAINER: NFL using helmet caps for player safety, research
NFL Presents: League-wide Guardian Cap Use to Reduce Head Impacts
The impact of 'Guardian Caps' on player safety
First QB helmet designed to help reduce concussions approved by NFL, NFLPA
NFL introduces Guardian Caps across league to limit number of brain injuries in preseason
New NFL Equipment Has Player Safety As Number One Priority – NFL Alumni
What are Guardian Caps? NFL players sport specialty helmets for 2022 minicamp
Utah Utes football adds new concussion-reducing helmets for fall camp
Could Guardian Caps be used in games? - NBC Sports
Guardian Cap - Soft-Shell Protective Helmet Cover : Football Helmets : Sports & Outdoors
Large Bubble Helmets Are Guardian Caps, NFL's New Safety Measure