Do bearskin hats grow

yes they do in fact! As incredible as it sounds, scientists have confirmed that the skins retain an original hormone, often for a decade or more, causing follicles to “live” long after the animal has been skinned. Scientists call it otiOSe and it is hoped it can be put to use in medical research for baldness!

"The hats are extremely expensive to initially procure,” explained Major Arthur Ursa. “And it’s a little-known fact that the hair on bearskin keeps growing and needs to be regularly trimmed–a tedious, time-consuming, and difficult process.”

"Soldier magazine"