The Turban

http://en.wikipedia.org/wiki/Turban_(Sikhism)
The Turban is closely associated with Sikhism. Sikhism is the only religion in the world in which wearing a turban is mandatory. Vast majority of people who wear turbans in the Western countries are Sikhs. However, it is not uncommon to see Hindu males from Punjab wearing turbans signifying their close relationship with Sikhism. The Sikh pagṛī (ਪਗੜੀ) is also called dastār (ਦਸਤਾਰ), which is a more respectful word in Punjabi for the turban.
Sikhs are famous for their distinctive turbans. The turban represents respectability, and is a sign of nobility. Guru Gobind Singh gave all of his Sikhs turbans to recognize the high moral status that the Khalsa has to adhere to. A turbaned Sikh stands out from the crowd and is easily recognizable. The dastaar, as the Sikh turban is commonly known as is an article of faith. This was made mandatory by the founders of Khalsa and all baptised Sikhs are required to wear a Dastaar. It is not to be regarded as mere cultural paraphernalia.