While there were a couple of pointe shoes in the mix, metallic ankle boots proved just as popular and in-keeping with the dancer aesthetic. Those who have actually studied dance will leap at the opportunity to correct me, but as with anything, the fashion world does not present a truthful representation, nor does it aim to. One would also assume that the sheer tulle dresses are more form-fitting than any dance costume. Again, the clothes were not made to celebrate the joy of movement, but rather ballet as an art form which has bred its own aesthetic and uniform. It's always important to keep this in mind when intellectualizing fashion, as well as the context in which the clothes were created. The same could be said for any piece of art.