Arizona Cardinals defensive end J.J. Watt not fan of the new league-mandated Guardian Caps on helmets
NFL announces more steps to reduce head injuries
Reduces impact up to 33% One size fits all Insulates in hot & cold weather Fits both football and lacrosse helmets Connects to the facemask with 4
Guardian Protective Helmet Cover
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
Large Bubble Helmets Are Guardian Caps, NFL's New Safety Measure
Park High School football blazes safety trail with Guardian Caps
High school football looks to Guardian Cap for head safety
Certain NFL players must wear Guardian Caps through second preseason game