This is a fabulous vintage piece, made of Dacron/poly taffeta, with 4 gathered sections onto the body of the slip. It has great movement, just enough stiffness to add flair and is perfect under that 50s or country skirt. Vintage 50s, but in great shape! No stains. By “American Maid” labeled as MED (but I think it tends to Small/Med). Thanks for looking.