The league's updates are based on “head impact severity” reviews conducted with input from the NFL Players Association.

"The Guardian Cap is worn by over 500,000 football athletes, but primarily in practice," says Hanson. "As for games, football ...

MADISON, Wis. (WSAW) - A study of 2,610 Wisconsin high school football players found that wearing soft-shell helmet covers, marketed as Guardian Cap helmet devices, during practice had no effect ...

Ten other models were also deemed “Guardian Cap optional,” meaning that they perform well enough that the NFL won't require players with those helmets to wear a Guardian Cap during training ...

Football sometimes gets a bad rap ... everything was being done to help players be safe. The purpose of the Guardian cap is to help prevent head injuries.” Vincent said that the cap is like ...

In case you missed it, the Green Bay Packers had a big 30-13 win on Sunday Night Football over the Seattle ... the game with the addition of a Guardian Cap, likely worn as a precaution following ...

Among those players is Damar Hamlin, who recently started wearing the Guardian Cap over his helmet in the Bills' preseason games. What exactly are Guardian Caps, and how effective are they?