
Our Lady of Mount Carmel and Saints (Simon Stock, Angelus of Jerusalem, Mary Magdalene de’Pazzi, Teresa of Avila) by Pietro Novelli from the public domain
Today the Church commemorates the Feast of Our Lady of Mount Carmel, patroness of the Carmelite Order in which she appeared to St. Simon Stock, and bestowed upon him the brown scapular in 1251. According to The Sisters of Carmel, Our Lady bestowed the following promise to those wearing the scapular: “This shall be a privilege for you and all Carmelites, that anyone dying in this habit shall not suffer eternal fire.” In time, the Church extended this magnificent privilege to all the laity who are willing to be invested in the Brown Scapular of the Carmelites and who perpetually wear it.”
To be eligible to be enrolled in the Brown Scapular Confraternity, one must go through a simple ceremony and receive the blessing from a priest in which the scapular should be worn at all times.
Our Lady of Mount Carmel, Pray For Us

Source: https://www.sistersofcarmel.com/brown-scapular-information.php