The Holstebro Dragons and Guardian Caps: Leading the Way in Player Safety
Youth Football Teams Try Helmet Caps To Reduce Concussions - CBS Boston
NFL players wear Guardian Caps to reduce head trauma during training camp
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
CHSAA: No helmet covers allowed during high school football games
NFL hopes to reduce head injuries with helmet experiment
NFL mandates extra head protection for training camp
NFL's Guardian Caps leave mixed reviews among teams including Eagles
More padding the issue of concussions and better helmets
NFL hopes to reduce head injuries with helmet experiment