The "Sacred Thread," known as Yajnopavita or Janeu in Hindu culture, is a ceremonial thread worn by males, symbolizing their initiation into spiritual and social responsibilities. It is typically made of cotton or silk and is draped over the left shoulder, crossing the body to the right side. The ceremony of wearing the sacred thread, called Upanayana, marks a significant rite of passage, often occurring during adolescence. The thread represents purity, knowledge, and the commitment to lead a righteous life. It is associated with the Brahmin, Kshatriya, and Vaishya castes, who traditionally undergo this initiation. The sacred thread serves as a reminder of one's duties and the importance of education and moral conduct in life.