If the apron is the "badge of a Mason" in the Blue Lodge, the cap can be said to be the public badge of a Scottish Rite Mason. In our Order, the cap is both a prayer cap in the Jewish tradition and a symbol of the Scottish Rite Mason as a soldier in the "Empire of Intellect, Reason, Philosophy, and Wise Morality" (32°). Similarly, a cap was worn by English knights, including the Templars, and was later given a military significance by British regimental soldiers in the 19th century. The Supreme Council adopted the present caps in 1927.
When To Wear The Scottish Rite Cap