This is a Diane von Furstenberg dress. It's made of silk and Lycra blend, which makes it stretchy and smooth, perfect for resorts and the like. Lycra is used in sportswear and underwear, and it has features like stretchability and moisture-wicking properties. It's comfortable to wear. Because it clings to the skin, even though the bust area is open, you can wear it without a bra strap showing, so I didn't have any trouble choosing underwear. Size: USA 2 Bust: 38 Waist: 34 Length (including shoulder straps): 94 Color: Pink 1