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.

Seeking to reduce head contact, NFL mandates use of Guardian Cap helmet for early portion of training camp - ESPN

Coronavirus: NFL suggests face shields on helmets - Los Angeles Times

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

NFL Mandated Guardian Caps: Controversial Change - Sports

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

Why are NFL players wearing padding on helmets at training camp

Why are players wearing padded helmets at NFL training camps?

NFL Players Seen Sporting Futuristic New Helmets During Training Camp (PICS)

Guardian Cap debuts during minicamps in effort to reduce avoidable head contact

What are Guardian Caps and how are they helping football teams?

Cowboys seen wearing protective, NFL mandated Guardian Caps at

What's with padded helmet caps teams are wearing