St. Teresa of Avila called Carmel the Order of the Virgin. St. John of the Cross credited Mary with saving him from drowning as a child, leading him to Carmel and helping him escape from prison. St. Theresa of the Child Jesus believed that Mary cured her from illness. On her First Communion she dedicated her life to Mary. During the last days of her life she frequently spoke of Mary.
There is a tradition (which may not be historical) that Mary appeared to St. Simon Stock, a leader of the Carmelites, and gave him a scapular, telling him to promote devotion to it. The scapular is a modified version of Marys own garment. It symbolizes her special protection and calls the wearers to consecrate themselves to her in a special way. Obviously, no magic way of salvation is intended. Rather, the scapular is a reminder of the gospel call to prayer and penancea call that Mary models in a splendid way.