I just finished this costume yesterday. It’s for one of our hotel staff. The black and orange swirled fabric is 100% rayon (which was a popular fabric in the 1920, known as man-made silk), and the solid orange is a cotton/silk blend. I used glass beads at the neck edge, and hand stitched the asymmetrical and slightly handkerchief-y hem.
And the bias-cut viscose slip for underneath.
Sorry the photos are so bad, my camera and I were having problems finding decent lighting. I tried outside but it was way too windy.