100% Pure Mulberry Silk Facial Beauty Pillowcase (King, Ivory) 100% Pure Mulberry silk, a Luxurious, smooth, strong, hypoallergenic and breathable natural fiber Standard/queen size: 20 x 30 inches, King size: 20x36 inches Hidden zipper closure at the end seam for style, comfort and better fit Minimizes wrinkles and eliminates bed hair. Machine washable and dry cleanable.