There are two distinctive shapes used in the UK for doctor's gowns; the Oxford doctor's shape and the Cambridge doctor's shape. The former has bell-shaped sleeves, the latter has long open sleeves. Another rarer form is the Cambridge Doctor of Music dress gown which is a pattern between the two. The other form of doctor's gown is the undress gown. This is a black gown worn for less formal occasions such as lectures. This type of gown is rarely seen or worn nowadays as many wear the dress gown instead; however, the undress gown still plays a part in the older universities where academic dress is usually worn.