In the 90's, the slip dress was the height of fashion - part of the underwear as outerwear trend, easy to dress up or dress down. This one is unbranded but has lovely details and sweetheart neckline panel on the front.
Brand: Unbranded Fabric, not marked, probably polyester satin or maybe a viscose mix
Good vintage condition fabric no holes, flaws or pilling.
Size unmarked, would fit size 10-12 depending how you like to wear.