Do padded helmet covers actually protect football players? - Futurity
New NFL Helmets - NFL Testing Validates Benefit of Guardian Caps
New NFL Helmets - NFL Testing Validates Benefit of Guardian Caps
What is the Q Collar, the device NFL players are wearing around their necks
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
What are Guardian Caps? NFL's latest padded helmets for added safety
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
NFL says positions wearing Guardian Caps saw 52% decrease in concussions - NBC Sports
Guardian Cap Results: “Exceeded Our Expectations”
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Guardian Caps: What Are They & How Do They Work?
What are Guardian Caps? NFL's latest padded helmets for added safety
Equipment To Protect Your Top Commodity - Training & Conditioning
Top Equipment To Protect Your Players - Coach and Athletic Director
NFL mandates use of Guardian Caps for training camp in 2022 - Cincy Jungle