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's with padded helmet caps teams are wearing
The story behind those soft-shell puffy Guardian Caps players have been wearing
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nfl helmets training camp
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Guardian Caps debut at training camps throughout NFL
What Pros Wear: Guardian Caps What are Those Helmet Covers Being
NFL Guardian Caps: How Do They Work? – NBC Connecticut
Why are NFL players wearing padding on helmets at training camp
Photos: Why the Chicago Bears wear padded helmets – Chicago Tribune
Why are NFL players wearing padding on helmets at training camp