Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
Riddell launches Axiom, latest helmet to combat concussions
NFL hopes to reduce head injuries with helmet experiment
NFL's safest helmet ever may not be enough to stop concussions
Study: Newer Football Helmets Could Slash Concussion Risks
Teen's woodpecker-inspired system aims to reduce football concussions
Better helmets, stricter laws needed to protect student athletes - Chalkbeat Colorado
New NFL Helmets: Will the Quarterback Special Helmets Aid in Preventing Concussions? - The SportsRush
Football helmets have improved but are far from 'concussion proof' – Orange County Register
New Football Helmet Could Save the Sport