Is that lace? That’s so cool. I remember watching a video on traditional… lace-making-techniques (it had a word, which I forget) and it was really interesting. It’s was cool to see old techniques, that I was completely unaware of, being used in new ways.
Edit: Tatting! One old-timey-lace-making-technique is called tatting.
Edit the second: Nope, I just realized her back is much darker. Maybe it’s embroidery stuff on sheer material?