Vintage French laundry stretchy sweater

This top is black but has an inner piece that is connected and that is purples, wines, browns, and green. Says size small but I think it seems more like a medium. I dont see the tag that says what it's made out of but it must be some rayon, polyester, and spandex. The top is heavy due to the fabric used. Does not wrinkle. Casual. gently worn. non-smoking household.