A bearskin is a tall fur cap derived from mitre caps worn by grenadier units in the 17th and 18th centuries. Initially worn by only grenadiers, bearskins were later used by several other military units in the 19th century. The bearskin cap continued to see use in battle during the mid-19th century, although by the 20th century, it was only used for parade dress. In the 21st century, the bearskin cap is retained by select military units as a prominent element of their ceremonial and full dress uniforms.