Bustier is one of most known lingerie pieces (for women of course). Even though it looks somewhat like basque – it is shorter, and reaches down to the ribs only. The primary purpose of bustier is to push the breasts up. It tightens against the midriff gently shaping the waist area.
Bustiers may also be worn as undergarments as push-up bras. Some women prefer to wear them this way when their dress has a low-back. However they look best when worn as outerwear (just like camisole).