OEKO certified material: 22 momme 100% 6A grade mulberry silk. 600 yarn counts, invisible zipper design in multiple sizes and colors: suitable for most pillows. Provide high-quality and durable solid color, which is not easy to be dehydrated after washing. The stitching is neat and the workmanship is exquisite. Anti-aging: DISANGNI silk pillowcase, natural anti-aging product, hypoallergenic, smooth, soft and breathable. Take you into a beautiful dreamland. No wrinkles, best for hair and skin: Silk pillowcases can prevent hair from knotting and tangles, sleep well and reduce facial wrinkles. Smooth and natural, will not irritate your delicate skin.