The Tam o' Shanter (Scottish hat) was named after the character, Tam o' Shanter, in a poem of that name by Robert Burns. The "bee in the bonnet" is made of wool with a pompon in the center. Originally Tam o' Shanters were only made in blue, because of the lack of chemical dyes, and were called "blue bonnets". Now they come in all shades, including tartans. In Scotland, it is traditional for soldiers to wear a tam o'shanter, while officers wear the Balmoral or Glengarry instead.