Extremely comfortable, flexible, and they maintain their shape. I powerlift and they keep their shape through full range squats, and even with squatting they remain opaque. I love that I can wear them in the gym and to work with a cute dress or tunic. I wash them in the machine and hang dry them and they perform and wear consistently. My only gripe is that because they are so amazing and luxe, they aren't super breathable. I combat this with a liner that keeps me fresh all day. I don't find each of the sides to be very different.
These leggings are very nice and feel thick. I bought two pairs and had thought these were the one I would end up keeping. In truth, had I liked them, I would probably have just kept them both! These were good, the inside seam stitching looked too much like workout leggings to cross over and be worn out with boots. I did like the thickness/support. The waistband was much more comfortable on the Hue brand leggings. And those are the pair I would keep. In fact, I went back during the sale and bought another pair.
Love the quality and feel of Zella. Leggings aren't see through and fit nicely on leg without being too tight. Just beware to look at the picture online closely--leggings are long at the bottom. Thus, if you are petite probably not the leggings for you.
A friend of mine recommended that I try out Zella's Live In Leggings. I go ahead and decide to purchase a pair to try them out, and see if her claim stands true. Being a little hesitant at first, the moment I wore these leggings, I fell absolutely in love! I will never buy any other kind of leggings again, whether for working out or casual wearing use.