Size 0 The top floral portion is a somewhat sheer satiny polyester with a very sheer polyester lining inside. Note that this may be a little bit see-through! - The bottom black portion is a polyester/rayon/spandex blend knit shell with a satiny polyester and spandex lining inside. Note that this is not extremely stretchy! - Zips about halfway down the back with a buttoned keyhole closure along the back of the neckline