NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
What are Guardian Caps? NFL's latest padded helmets for added safety
NFL hopes to reduce head injuries with helmet experiment
NFL hopes to reduce head injuries with helmet experiment
Concussions: Can cap keep football players' heads in game? – Orange County Register
NFL reports reduction in concussions among players who wore Guardian Caps in preseason - The Athletic
NFL hopes to reduce head injuries with helmet experiment - The San Diego Union-Tribune
NFL players wear Guardian Caps to reduce head trauma during training camp
Ohio State Aiming To Reduce Head Injuries With Guardian Caps - Sports Illustrated Ohio State Buckeyes News, Analysis and More
What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear
Puffy Guardian Caps Could Reduce NFL Player Concussions
Puffy Guardian Caps Could Reduce NFL Player Concussions
More padding the issue of concussions and better helmets