Erin Wasson from a shoot promoting her collection with Zadig & Voltaire on http://www.net-a-porter.com/
Sadly her staple of cool can't be bought, but here's a link to the dress that's available now http://www.net-a-porter.com/product/176111
With such a dramatic statement at the back of the dress I wouldn't want the front to disappoint, so I'd wear a chunky necklace in silver to draw attention up top and maybe a cuff, or two, to match on the wrists.
Noreen xx