not just Sikhs
A turban, is a kind of headwear based on cloth winding. Featuring many variations, it is worn as customary headwear, usually by men. Communities with prominent turban-wearing traditions can be found in South Asia, Southeast Asia, the Near East, the Arabian Peninsula, North Africa, the Horn of Africa, and parts of the Swahili Coast. Turbans worn in South Asia are known as Pagri.
Wearing turbans is common among Sikhs, who refer to it as a Dastar. In certain other faith communities, the headgear also serves as a religious observance, including among Muslims, who regard turban-wearing as Sunnah Mu'akkadah