So I had purchased these tights from a different seller before in black and blue and they were opaque that's why I had no qualms about ordering it this time. I bought it in fyp54(black) and it's see through... I can see the tag and my hand through the leggings before I even put them on. I don't know if it's just a bad batch or their quality has dropped generally. I might order a different colour just to compare since I loved them before but my advice would be NOT TO PURCHASE in fyp54(blk) if you want to use them for the gym.