 Even in modern times of the 21st century, the Order of Canons Regular of Premontre (Premonstratensians, Norbertines or white canons), the Camaldolese, the members of the Orders of Our Lady of Mercy and of the Holy Trinity, and the Olivetans, as well as a few other orders who wear a prelatical costume have the privilege of wearing the ferraiolo entirely of white cloth.The Premonstratensians also have the privilege of wearing this garment with a white four-cornered biretta of the same material.Some white canons even choose to wear white shoes when dressed in this formal attire.