Nylon was not invented before the late 30ies, so the tights are an anachronism.
Natural fibers (cotton, wool, silk...) would not result in the even, semi-opaque aspect with no wrinkles in the knee and foot area.
Explaining her viewpoint, she said: 'In human years, I am like 28.
In time that humans have set, which isn't real, I'm 28.
"It was both of our first times having an onscreen [sex] scene. All of these things are artificial, and you have to strip that away if you're going to achieve a sense of intimacy.
It was such a safe, comfortable environment and I am so grateful that it was with Miles, because he was such a gentleman and made me feel very comfortable and nurtured. In real life sex is messy, and we wanted to get at that wonderful messiness." — Ryan Gosling, on 9.