A bustier is a form-fitting garment that extends from the bust to the waist, designed to enhance the wearer's shape. Typically made from materials like lace, satin, or cotton, it often features boning for support and structure. Bustiers can be worn as lingerie or as outerwear, depending on the style and occasion. These garments are often associated with lingerie and corsetry, providing a similar silhouette to a corset but with more flexibility. Bustiers may include adjustable straps and hooks for a customizable fit, making them popular choices for special events or as part of a fashionable outfit.