?OEKO Certified Material??100% Mulberry Silk,both side 19 Momme 600 thread count,with hidden zipper design.?Multi Size&Color:QUEEN 20×30 Inches (50cmX75cm)fits most QUEEN size pillows. KING 20×36 Inches(50cmx90cm) fits most KING size pillows.STANDARD size 20×26 Inches (50cmX66cm)fits most STANDARD size. Superior durable plain color for choose ,not easy to run after washing.Exquisite craftmanship of the neat stitches.?Anti-aging:ZIMASILK Silk Pillowcase,the natural anti-aging product,smooth,soft and breathable.It takes you into a beautiful dream.?Wrinkle free &Best for hair and skin: The silk pillowcases prevent hair from becoming knotted and matted,have good sleeping,reduce facial wrinkles. Silky and naturally,WON??T cause irritation to your delicate skins.?GREAT GIFT CHOICE:Ideal gift choice for Thanksgiving,Christmas,New Year festivals.We hopefully you appreciate a value experience.It is really a wonderful and secret gift for you and your lovers keeping young.