What are Guardian Caps? NFL's latest padded helmets for added safety
Wake Up Washington Commanders adjust to guardian caps at first practice of training camp
Coverage of the NFL in Guardian Caps
NFL hopes to reduce head injuries with helmet experiment
So what exactly is that black padding on the Syracuse football helmets seen during practice?
Florio PFT] The Guardian Cap apparently works. But if a player asks to wear it in a game, the league would say no. : r/nfl
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
It's been devastating': former NFL players count the cost of concussion, Concussion in sport
Soft Cover Football Helmet Add-ons
Football helmet - Wikipedia
EXPLAINER: NFL using helmet caps for player safety, research
Guardian Caps: NFL requires use of helmet cover at training camps to reduce head injuries