What Pros Wear: Guardian Caps What are Those Helmet Covers Being Worn in Practice? - What Pros Wear
Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
NFL training camps: Guardian Cap players are wearing over helmets, why
Guardian Caps: Why some NFL players are wearing them in training camps
NFL CMO Dr. Allen Sills explains importance of mandated guardian caps during training camp
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games
NFL Mandated Guardian Caps: Controversial Change - Sports Illustrated Seattle Seahawks News, Analysis and More
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
NFL hopes to reduce head injuries with helmet experiment
Football Guardian Cap draws mixed reviews from players, experts for safety effectiveness - The Daily Tar Heel