Concussions: Can cap keep football players' heads in game? – Orange County Register
Football Gameday Information – UK Athletics
NFL hopes to reduce head injuries with helmet experiment
As NFL mandates Guardian caps in practice, area high school football teams have been using them for years, Sports
NFL CMO Dr. Allen Sills explains importance of mandated guardian caps during training camp
Guardian Caps Guardian Sports
EXPLAINER: NFL using helmet caps for player safety, research
Guardian Caps Guardian Sports
NFL players wear Guardian Caps to reduce head trauma during training camp
What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear
What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear