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.

Football helmet - Wikipedia

Guardian Caps: Why some NFL players are wearing them in training camps

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

EXPLAINER: NFL using helmet caps for player safety, research - The

Guardian Cap: What are and why the NFL asks this safety measure in helmets

Could Guardian Caps be used in games? - NBC Sports

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

EXPLAINER: NFL using helmet caps for player safety, research

What Pros Wear: WPW Report: NFL Starting Quarterbacks 2020

Guardian Caps: Why some NFL players are wearing them in training camps

NFL CMO Dr. Allen Sills explains importance of mandated guardian

What are Guardian Caps? NFL players sport specialty helmets for 2022 minicamp

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