Thick lined ribbed fabric. Our best-selling Lexi fabric (you know, the stretchy ribbed one with the magical slimming powers) is something to write home about. It has the 2x2 rib structure you've come to love and is made with sustainable TENCEL Lyocell fabric, plus a bit of Spandex — so it's flattering and insanely easy. We made this one with a heavier-weight fabric for comfort and those cold nights out on the town.