Why Alabama football players are wearing padded helmets in practice
Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
Guardian Caps Guardian Sports
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
Coverage of the NFL in Guardian Caps
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
As NFL mandates Guardian caps in practice, area high school football teams have been using them for years, Sports
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Large Bubble Helmets Are Guardian Caps, NFL's New Safety Measure
Why are NFL players wearing padding on helmets at training camp?
NFL report: concussions dropped 50 PERCENT when players wore new 'Guardian Caps' over the summer
Coverage of the NFL in Guardian Caps
NFL players wear Guardian Caps to reduce head trauma during training camp