The use of special garments in the ceremonies of Magic follows reasonably enough from the religious character ascribed to these operations. Peter de Abano recommends a priest's garment if possible, by which an alb may be understood. 2

The shoes and hat should be of white leather, bearing the same characters 3 written in cinnabar diluted with gum-water, the pen of the Art being used. The following names must be written about the hat: 4 JEHOVA, behind; ADONAY, on the right hand; ELOY, on the left; and GIBOR, 5 at the front.
148:2 A long garment of white linen, close before and behind, covering the whole body even to the feet, and cinctured by a girdle--such is the ordinance of pseudo-Agrippa.
149:1 According to the Key of Solomon the thread of which they are made should be spun by a young maiden.
149:2 The Key of Solomon renders these names differently, namely: Amor, Amator, Amides, Ideodaniach, Pamor, Plaior, Anitor; for Sabbath garments it substitutes Vestments of Power.
149:3 Special characters are given for the garment and the shoes by the Clavicle. They bear no analogy to anything in the Grimoire.
149:4 For the hat or bonnet a crown is prescribed in the Clavicle, and it should be made of virgin paper.
149:5 In place of these words the Key of Solomon substitutes El and Elohim.