The term 'Turkish Cap' refers to two different types of headwear. The first is a FEZ, which is a red, cylindrical hat with a flat top and a tassel on the side. It was traditionally worn by men in the Ottoman Empire and is still popular in some parts of the Middle East. The second type of Turkish Cap is a calpac, which is a tall, conical hat made of felt or cloth. It is usually black or white and is often decorated with embroidery or beads. Both the FEZ and the calpac are traditional forms of headwear in Turkey and other parts of the Middle East.