The term 'FOREIGN LEGION HATS' refers to the distinctive headgear worn by members of the French Foreign Legion, which is a military unit of the French Army. The most recognizable hat is the Kepi, which is a five-letter word that is often used to describe the hats. The Kepi is a cap with a stiff visor and a flat top, and it is usually made of either wool or cotton. It is typically adorned with a badge or insignia that identifies the wearer's rank and unit. The Kepi is an iconic symbol of the French Foreign Legion and is a popular item among collectors.