16mm Silk Pillowcase King Size Pillow Case Cover with Hidden Zipper Satin Underside Mediumviolet silk 100% pure mulberry 16mm silk front side,polyester white satin backside,zipper closure. competitive price with good quality. Silk benifts:anti aging,good for skin,hypoallergenic,hair protection. SIZE- 20 X 36 inches (51 x 92cm), fits most King size pillows.Hidden zipper closure at the side to prevent slipping. Silk care: Machine-washable in lukewarm water on most gentle cycle available. Hang to Dry. Cool Iron. Do Not Bleach. Can Also Be Dry Cleaned.