This Vince dress just arrived for me:
http://www.shopbop.com/boucle-.....orId=10701
It's available at piperline and nordstrom as well, or at least was when I ordered it.
The fabric and cut are fabulous. It feels like wearing sweats but looks really polished. It made me look taller, thinner, and curvier than anything I own.
HOWEVER - I have no idea why they call it burgundy. It is a dark brown, not quite chocolate, with just the tiniest bit of red in it. This is not a good color on me. More importantly, I really dislike the color (I really dislike all dark browns for me.)
But if anyone else is looking for a brown sheath, try this one! Color aside, it is one of the most flattering things I have ever tried on.