Virginia Tech lab releases first safety ratings for youth football helmets
Helmet Innovation: Continued advancements to keep players safer
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets
NFL Testing Safer Helmets
New Football Helmet Could Save the Sport
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
How football helmets fail to protect against some of the most dangerous hits in the game - The Verge
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Experimental Helmet Aims To Fix Football