The taqiyah (Islamic Cap, “ṭopī”) is a short, rounded skullcap. They are often worn for religious purposes, for example, Muslims believe that Muhammad used to keep his head covered; therefore making it mustahabb, which means 'commendable' to cover the head in order to emulate him. Muslims often wear them during the five daily prayers.
When worn by itself, the taqiyah(islamic Cap) can be any color. However, particularly in Arab countries, when worn under the keffiyeh headscarf, they are kept in a traditional white. Some Muslims wrap a turban around the cap, called an amamah in Arabic, which is often done by Shia and Sufi Muslims. In the United States and Britain taqiyas are usually referred to as "kufis".