Why are NFL players wearing padding on helmets at training camp?

Bengals linemen, linebackers and tight ends wore Guardian Caps at training camp after the NFL required the padding for some position players this preseason.

NFL hopes to reduce head injuries with helmet experiment

Safety first: Lopers to wear padded caps in practice to prevent concussions

NFL's use of Guardian padded helmet caps in camp draws support and

Security badge, Other design contest, Security Badge

The story behind those soft-shell puffy Guardian Caps players have been wearing

NFL Mandated Guardian Caps: Controversial Change - Sports Illustrated Seattle Seahawks News, Analysis and More

nfl helmets training camp

The story behind those soft-shell puffy Guardian Caps players have been wearing

NFL training camps: Guardian Cap players are wearing over helmets, why

NFL's use of Guardian padded helmet caps in camp draws support and

NFL players beginning to adopt protective Guardian Caps over helmets at practice - NBC Sports

NFL Mandated Guardian Caps: Controversial Change - Sports