OEKO Certified Material: 100% Mulberry Silk, both side 19 Momme 600 thread count, with hidden zipper design. Available in size 40x60cm. Superior durable plain color for choose, not easy to run after washing. Exquisite craftsmanship with neat stitches. ZIMASILK Silk Pillowcase is a natural anti-aging product, hypoallergenic, smooth, soft, and breathable, promoting a beautiful dream. The silk pillowcases prevent hair from becoming knotted and matted, reduce facial wrinkles, and ensure good sleep. Silky and natural, they won’t cause irritation to your delicate skin. Experience silky enjoyment with our silk-made pillowcases. We hope you appreciate a valuable experience. It is a wonderful and secret gift for you and your loved ones to keep young.