One of the things that I really learned much more about at the London conference was sprang. Dagmar Drinkler and Carol James did a joint paper about tight-fitting trousers in Antiquity and Renaissance, and their arguments for at least some of the depicted trousers in artwork being made in sprang were, in my opinion, absolutely solid.
Even better was seeing and touching the sprang objects they both had brought, and seeing a pair of trousers in action (worn by Carol James). Together with seeing lots and lots of pictures of the Coptic sprang "hairnets" (many of them look more like caps or bags to me, since the word "net" does evoke some kind of openness or lacyness for me), my understanding of what is possible with this technique has grown a lot.
Carol James, by the way, has a website and a blog; she has made a few instructional videos, and you can also buy a book with instructions from her. Do check out her website, there is amazing stuff to be found on it!