Black ponte knit made of a blend of natural and synthetic fibers, as determined by a burn test. It's probably rayon, polyester, and spandex, percentages unknown. This is a thinner ponte, just a bit beefier than an interlock. This light to medium weight fabric would work well as a top, dress, loose pant, skirt, or cardigan. Crosswise stretch only, so if you make tight pants out of it, you won't be able to sit down. :)