OEKO Certified Material: 100% Mulberry Silk, both sides 19 Momme, 600 thread count, with a hidden zipper design. Available in multiple sizes and colors, including 40x60cm in Taupe. This durable plain color is resistant to running after washing and features exquisite craftsmanship with neat stitches. ZIMASILK Silk Pillowcases are natural anti-aging products that are hypoallergenic, smooth, soft, and breathable, promising a beautiful sleep. They prevent hair from becoming knotted and matted, reduce facial wrinkles, and are gentle on delicate skin, providing a silky enjoyment. We hope you appreciate a valuable experience. It is a wonderful and secret gift for you and your loved ones to maintain a youthful appearance.