In that case it is not the Little Black Dress but the Little Black Bag for the not really LBD.
To make it even practical I felted in two pockets colored like the dress.
What I couldn't catch on the photos: that parts where the embroidery is, is felted of wool carded with glittering fibers, so it shines nicely.
...and felt bags CAN look also elegant not only eco-aunt-like. (Don't throw at me, I heard this from others.)