Puffy, spongy Guardian Caps could help curb NFL head injuries

High school football teams go soft in the fight against brain injuries

For Giants and the NFL, it's the Summer of Guardian Caps - Newsday

NFL hopes to reduce head injuries with helmet experiment

High school football teams go soft in the fight against brain injuries

Guardian Caps: Why some NFL players are wearing them in training camps

Here's why some Patriots players are wearing caps over their helmets during training camp

Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post

Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries

Coverage of the NFL in Guardian Caps

Here's why some Patriots players are wearing caps over their helmets during training camp

For Giants and the NFL, it's the Summer of Guardian Caps - Newsday

NFL says positions wearing Guardian Caps saw 52% decrease in concussions - NBC Sports