Abstract: A mastectomy bra is constructed with a built-in prosthetic device and includes at least one bra outer portion within which a breast-shaped prosthetic device of varying weight and composition is permanently adjusted. The single bra cup includes an outer fabric layer fully enclosing and supporting the prosthetic device, and the outer fabric layer includes a breast contoured portion and a body facing portion. The prosthetic device is formed in a natural shape of a woman's breast. The device is also constructed of a non-permeable, soft flexible outer shell layer within which is disposed the fluid-like material. An optional valve may be included for adding or removing fluid material from the bra cup for aesthetic adjustment of its size.