The lines on this classic dangerously-smoothing underslip are so va-voom sexy in their own right we wouldn't blame you if you thought this might be a cocktail dress. Rather, it's the cocktail dress's best friend. The one that sticks with her through thick and thin, that smooths over any rough patches, that always offers killer support, tells her she looks gorgeous, and always shares the passed champagne. Signature stretch mesh is strong but breathable, and the built in cross-over bra has a stretch-satin underband (and no bulky wire). LBD BFF's.