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(NEXSTAR) — Green Bay Packers wide receiver Romeo Doubs wears one. So does Tampa Bay Buccaneers offensive tackle Luke Goedeke. Safeties Taylor Rapp of the Buffalo Bills and Jabrill Peppers of the Pittsburgh Steelers, Los Angeles Rams offensive linemen Kevin Dotson and Alaric Jackson, and a handful of other players have worn them as well.

They’re more common during training camp, of course, but padded helmets have gained popularity during the NFL regular season.

The extra padding that makes the helmets almost comically larger is known as a Guardian cap. Made by Guardian, the cap is meant to serve as "a soft shell barrier" between the player's head and impact.

Previously released data from the NFL showed the cap can absorb at least

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