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During the early Middle Ages, the laity began to associate themselves with various monastic orders and formed Confraternities, secular oblates that would receive the scapular to wear upon death, as a sign of great honor. Eventually, this tradition transformed into the small sacramental scapulars of today that are worn daily under or over regular clothing as an open sign of devotion. The four oldest scapulars originated from four confraternities, the Carmelites, Servites, Trinitarians, and the Mercederians. Today there are many more kinds of scapulars, and not all of them associated with a particular confraternity.

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A small scapular must consist of two wool squares of cloth, connected by two strings (of any material), so that one segment rests on your chest and the other on your back. If you would like, you can wear more than one scapular at a time, so long as each scapular is complete. Once you have your scapular it is important to have it blessed by a priest and, if necessary, to become invested in the confraternity associated with it (a further blessing that can be granted by an authorized priest).

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Once you have your scapular blessed, it must be worn at all times in order to share in the indulgences and privileges of the particular scapular. Should you remove the scapular for any period of time you are no longer eligible for its associated blessings, however, as soon as you resume wearing the scapular you are reinvested in its indulgences. Should your scapular wear out, you may replace it with a new scapular, as the indulgences are invested in the devotion of the wearer, not the object. Although the initial scapular investment prayer is recited only once and is bound to the wearer, each new scapular that replaces a worn or lost one can be blessed by a priest.

Types of Scapulars

Scapular of Our Lady of Mount Carmel (Brown Scapular)

Scapular of Conversion (Green Scapular)

Scapular of the Immaculate Conception (Blue Scapular)

Scapular of the Passion (Red Scapular)

Scapular of the Most Sacred Heart of Jesus

Scapular of Our Lady of Ransom (Ransom)

https://www.catholiccompany.com/content/how-to-use-the-scapular#

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