Its a very short dress with spaghetti straps made from silk or satin. It's "backless" in spirit and theory. Has a two-tier skirt when it feels like it.
Use at 1 strength
From front: shiny dress, short dress, sleeveless, spaghetti straps
From back: shiny dress, short dress, sleeveless, spaghetti straps, backless dress, from behind
Or just do whatever. Has fun with sash and laces, plunging neckline, corset, etc