Clothing of Religious
The formal bestowal of the religious habit on a postulant or novice at the time of profession implies their acceptance of the obligations contracted by the three essential vows of poverty, chastity, and obedience.
During the ceremony the aspirant withdraws for the robing, the different articles of the habit having been blessed by the bishop.
The manner of profession for a nun, according to the , prescribes that the professed receive the veil, ring, and bridal wreath from the bishop at the altar.
Originally the reception of the habit from abbot or bishop, apart from any formal vows, constituted profession.
A probationary habit is worn during the novitiate.
New Catholic Dictionary