What is a "bustier"?

A bustier is a type of form-fitting undergarment that extends from the bust to the waist or hips, providing support and shaping to the upper body. It typically features flexible boning and underwire cups to lift and enhance the bust, while also smoothing and contouring the torso. Bustiers can be worn as lingerie or as part of a formal outfit, such as a bridal or evening gown. They often feature decorative elements such as lace, embroidery, or satin panels to add a touch of glamour. Bustiers may also include detachable garter straps for attaching stockings.