These puffy helmet caps are the next big thing in NFL player
NFL's use of Guardian padded helmet caps in camp draws support and
NFL CMO Dr. Allen Sills explains importance of mandated guardian
Coverage of the NFL in Guardian Caps
Why Irv Smith Jr. Chose Bengals
Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
Guardian Cap Debuts at Training Camps League-wide
Football Guardian Cap draws mixed reviews from players, experts
NFL Media's Steve Wyche: How NFL's helmet technology has taken off