Guardian Caps: Why some NFL players are wearing them in training camps
Coverage of the NFL in Guardian Caps
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
The story behind those soft-shell puffy Guardian Caps players have been wearing
As NFL mandates Guardian caps in practice, area high school football teams have been using them for years, Sports
The story behind those soft-shell puffy Guardian Caps players have been wearing
Coverage of the NFL in Guardian Caps
For Giants and the NFL, it's the Summer of Guardian Caps - Newsday
Guardian Caps: NFL's hotly debated new safety measure here to stay?
NFL hopes to reduce head injuries with helmet experiment
What are Guardian Caps? Shadow Hills football using new device to reduce head injuries
High school football teams go soft in the fight against brain injuries
NFL training camps: Guardian Cap players are wearing over helmets, why
Guardian Caps: NFL Requires Use Of Helmet Cover At Training, 46% OFF