LULUSILK Silk Pillowcase with Cotton Underside Pure Mulberry Silk 19 Momme and 100% Cotton Natural White Queen Size 20x30 The front side is crafted by mulberry silk 19 Momme and the back side is crafted by 100% cotton. Good for hair and skin. Designed with cotton back for anti slip. Mulberry silk pillowcases contain a natural protein and amino acids. Protect the hair and skin, Anti wrinkles. Great absorbent, breathable and impressive moisture wicking properties, keeping you dry and comfortable in any climate, year-round. Machine-washable in lukewarm water (30 degrees Celsius). Hang to Dry. Cool Iron. Handwash recommended.