The G∴B∴G∴ calls for simplicity. The requirement is only that the ritual clothing be different from one’s customary clothing. While fancy ceremonial robes would fulfill this requirement, they would be contradictory to the G∴B∴G∴ emphasis on the Great Work in contrast to the accessories. A simple garment cut from cloth with holes for neck and arms could be sufficient, as could an inexpensive bath robe or night shirt.
In some Wiccan circles the choice is "skyclad—nakedness—so that all are equal before the gods and nothing is in the way of the body’s natural energy. The observation can be made that nakedness does not make us equal since we are very conscious of our physical appearance—slim, fat, tall, sort, hairy, etc.—a distraction from the Magick.