NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
NFL fans react to new guardian cap rules
Guardian Cap Debuts at NFL Training Camps League-wide
New Football Helmet Could Save the Sport
Helmets don't eliminate concussions. It's time for the NFL to ditch them, NFL
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games
NFL training camps: Guardian Cap players are wearing over helmets, why
Los Angeles Rams Support NFL Mandated Guardian Caps - Sports Illustrated LA Rams News, Analysis and More
The Coat of Arms Discussion: How are Serious Concussion Issues Changing Football?
NFL Mandates Guardian Caps >> Guardian Sports
More padding the issue of concussions and better helmets