 However, instead of an ordinary dark jacket, he wears a special black court coat (frock coat) and waistcoat in a style unique to Queen's Counsel or, alternatively, a long-sleeved waistcoat in similar style with no frock coat, known as a "bum freezer" because it is cut off at the waist.He also replaces the black stuff gown of a junior barrister with a black silk gown, although cheaper variants are also worn, including gowns of the same cut but all wool, or in a silk-wool mix, or in artificial silk.The all wool gown is, strictly speaking, a mourning gown, but that point is now of historical interest only.