To be clear, white clothing is not required to take part in a Kundalini meditation session. However, some people prefer to dress in white while meditating. This is because Yogi Bhajan, who brought the practice to the attention of many in the West in the 1960s and 70s, also taught that colours had an important effect on the consciousness of people. He said that white was a colour that helped to expand people's auras when it was chosen for clothing. He also said that white, as a predominantly reflective colour, could protect people while they were meditating from the so-called harmful energies that surround them. Some people continue with this tradition and will wear exclusively white clothes, including white turbans, when meditating. That said, many people do not feel the need to wear white or any other specific colour, either.