These tights are not worth buying. They do not make you skinnier or improve your shape in any way. They are really nothing more than regular tights, so just buy some in your home country, don't order them all the way from Korea.
The color is very dark. To be fair, even tights that are advertised as "fair skin" are too dark for my skin tone, but these are still a lot darker than I had expected. In the pictures they look quite light, but in reality they aren't.
I don't know whether they are as sturdy as advertised, I'm not going to actively try to cause a run in the tights. Now that I have them I might as well wear them. The only thing I can say is that they didn't get any damages right when I tried them on, which does happen with some tights.