Excellent answer, thanks brother!
Here is a small booklet that should answer all your questions:
acts1.info/e_books/GARMENT%20OF%20GRACE.pdf
Vatican Approval
In wearing the Scapular at all times we make silent petition for the Blessed Mother’s continual assistance. We share in all the prayers and good works of the Carmelite Scapular Confraternity throughout the world. Pope Pius XII often spoke of the Scapular. On the 700th anniversary of the appearance of Our Lady to St. Simon Stock,** Pope Pius XII referred to the Scapular as “the Sign of Consecration to the Immaculate Heart of Mary”. **The Scapular also represents the sweet yoke of Jesus Christ which Mary helps us to bear. And finally, the Pope continued, the Scapular marks us as one of Mary’s chosen children, and becomes for us (as the Germans call it) a “Garment of Grace”. Blessed Claude tells us, “Of all the pious practices which have inspired the faithful to honor the Mother of God, there is none so sure as that of the Scapular. No other devotion has been confirmed by so many and such extraordinary miracles.”
A
s we mentioned above, during the Scapular Anniversary celebration in Rome in 1951, Pope Pius XII told a very large audience to wear the Brown Scapular as a sign of consecration to the Immaculate Heart of Mary. Our Lady asked for this consecration in the last apparition at Fatima, when She appeared as Our Lady of Mount Carmel, holding the Brown Scapular out to the whole world. It was Her last moving appeal to souls to wear Her Scapular as a sign of consecration to Her Immaculate Heart.
**St. Claude de La Colombiere, **
the renowned Jesuit and spiritual director of St. Margaret Mary, gives a point which is enlightening. He said, “Because all the forms of our love for the Blessed Virgin and all its various modes of expression cannot be equally pleasing to Her, and therefore do not assist us in the same degree to reach Heaven, I say, without a moment’s hesitation, that the BROWN SCAPULAR IS THE MOST FAVORED OF ALL!” He also adds, “No devotion has been confirmed by more numerous authentic miracles than the Brown Scapular.”
Blessed Claude gives us the solution to the mystery of the missing Scapular:
‘You ask, ‘What if I desire to die in my sins?’ I answer, ‘Then you will die in your sins, BUT YOU WILL NOT DIE IN YOUR SCAPULAR.’ “ Blessed Claude tells the story of a man who tried to drown himself three times. He was rescued against his will. At last he realized that he was wearing his Scapular. Determined to take his life, he tore the Scapular from his neck and leaped into the water. Without Mary’s protective garment he accomplished his wish, and died in his sins.
Further Miracles.
(Some have in pure speculation thought that St. Joseph was a Carmelite [remember they were started by Elijah] and was the first to be consecrated to the Blessed Mother and is usually dressed in Brown and patron of a happy death.

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