【MATERIAL】 Both Sides 19 Momme 100% 6a Natural Silk. smooth and soft.silk fabric has 18 kinds of Amino Acids that are believed to effectively stimulate your skin cells' metabolism,to help your skin retain moisture.The more hydrated your skin is, the less noticeable fine lines and wrinkles become. 【SIZE】STANDARD 20''x26''(50cmX66cm); QUEEN 20''x30''(50cmX76cm); KING 20''x36''(50cmx91cm). 【HIDDEN ZIPPER】 Hidden zipper design, comfort and better fit, which could hold your pillow perfectly without move around. Large opening and long zipper make it easier for you to place pillows. 【ANTI-AGING】BEIJOEY silk pillowcase is the most natural anti-aging product.Silk's natural fiber and tight weave allow the skin and hair to slide over the pillowcase very gently and freely, it creates less friction between your hair&skin and the silk pillowcase, helps reducing facial wrinkles, preventing dry/ knotted hair and reduce hair loss.Improve your sleep quality. 【TEMPERATURE REGULATOR】 Pure silk is a natural temperature regulator to help feel cool in summer and warm in winter. Silk is a symbol of elegance and noble. The perfect gift for Birthday, Mother's Day, Father's Day, Valentine's Day, Christmas. The product packaging bag shown in the first picture is a new style. The item you receive may be in new or classic packaging.