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.

What are those helmet pads Chicago Bears offensive linemen have been wearing at practices? – Chicago Tribune

Cowboys seen wearing protective, NFL mandated Guardian Caps at

Vikings Introduce Soft-Padded Helmets for Parts of OTA Practices

Why are players wearing padded helmets at NFL training camps?

Cowboys seen wearing protective, NFL mandated Guardian Caps at OTAs

nfl training camp helmets

Cowboys seen wearing protective, NFL mandated Guardian Caps at

Here's why some Patriots players are wearing caps over their helmets during training camp

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

NFL CMO Dr. Allen Sills explains importance of mandated guardian caps during training camp

Guardian Caps leave some NFL players and coaches with concerns: 'You feel like a bobblehead

Why are NFL players wearing padding on helmets at training camp