NFL players experiment with 'Guardian Caps' to protect heads
Carolina Panthers tackle Taylor Moton wears a Guardian Cap over his helmet to provide an extra layer of protection during practice at the NFL football team's training camp in Spartanburg, S.C., Tuesday, Aug. 10, 2021. (AP Photo/Nell Redmond)

Carolina Panthers tackle Taylor Moton wears a Guardian Cap over his helmet to provide an extra layer of protection during practice at the NFL football team's training camp in Spartanburg, S.C., Tuesday, Aug. 10, 2021. (AP Photo/Nell Redmond)

Aug. 10, 2021 10:21 AM EDT
Carolina Panthers center Pat Elflein (60) adjusts his helmet, which is covered by a Guardian Cap during practice at the NFL football team's training camp in Spartanburg, S.C., Tuesday, Aug. 10, 2021. (AP Photo/Nell Redmond)

Carolina Panthers center Pat Elflein (60) adjusts his helmet, which is covered by a Guardian Cap during practice at the NFL football team's training camp in Spartanburg, S.C., Tuesday, Aug. 10, 2021. (AP Photo/Nell Redmond)

Aug. 10, 2021 10:24 AM EDT