More padding the issue of concussions and better helmets
What are Guardian Caps? NFL's latest padded helmets for added safety
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Concussions among players who wore Guardian Caps over summer dropped more than 50%, NFL says - ESPN
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
NFL says positions wearing Guardian Caps saw 52% decrease in concussions - NBC Sports
NFL Mandates Guardian Caps >> Guardian Sports
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
What are Guardian Caps? NFL's latest padded helmets for added safety
NFL players wear Guardian Caps to reduce head trauma during training camp