From the David's Bridal site: Our sculpting satin fabric works wonders, creating glamorous curves without the need for shapewear. This one-shoulder mermaid bridesmaid dress shines with double spaghetti straps in back, booty ruching, and a draped knot detail. Horsehair at the hem creates skirt drama. Inner Beauty: Built-in cups let you skip a bra. Don't want them? They're removable! A silicone strip helps the strapless side stay put. Galina Signature, exclusively at David's Bridal Polyester, spandex Back zipper; fully lined Hand wash Imported Worn once for a black tie wedding and hung in storage since wearing. No noticeable flaws.