1.[ Silk Silk]---High-quality mulberry silk on both sides, super silky and breathable. Compared to other fabric pillowcases, this silk pillowcase reduces friction by 44%, thus greatly preventing your skin from being rubbed by harsh fabrics. Here's how socialites keep their skin in amazing condition. 2.[ Hair and Skin]---It is well known that silk contains 80% natural protein and 18 amino acids, so it can greatly slow down the wrinkles caused by long-term use of this silk pillowcase. This silk pillowcase is soft and silky and also helps you to condition your hair, making it look shiny by reducing friction between the hair and the fabric. Let's say goodbye to tangled hair in the morning. 3.[ SLEEP REVOLUTION]---Super soft and breathable fabric can help you calm down and fall asleep faster, miraculously refresh your body. You can imagine when you sleep under your head, soft clouds, super soft, smooth, breathable, gentle, then you get rid of all kinds of anxiety, calm down quickly, and enjoy sweet dreams instead of sweaty ones. 4.[ Hidden zipper]---The hidden zipper design can fit easily and fix the pillow overnight. You never have to worry about sharp metal zippers that might hurt your skin.