Here you go (from http://www.sikhs.org/khalsa.htm): Turban. A symbol of royalty and dignity. Historically the turban has been held in high esteem in eastern and middle eastern cultures. Guru Gobind Singh transformed this cultural symbol into a religious requirement so that the Khalsa would always have high self-esteem. It differentiates Sikhs from other religious followers who keep long hair but wear caps or keep matted hair. The turban cannot be covered by any other head gear or replaced by a cap or hat. The turban is mandatory for Sikh men and optional for Sikh women. & underneath the turban is the kesh: Long unshorn hair. A symbol of spirituality. The Kesh reminds a Khalsa to behave like the Guru’s. It is a mark of dedication and group consciousness, showing a Khalsa’s acceptance of God’s will. Long hair have long been a common element of many spiritual prophets of various religions such as Jesus, Moses and Buddha. hope that helps.