About this item [PURE SILK UPPER SIDE, PREMIUM COTTON UNDERSIDE]: silk pillowcase is the perfect choice to enter the world of silk. Inexpensive yet effective in treating common sleep-related facial/hair problems, our 19 Momme pillowcases is the ultimate, as well as the easiest way to turn your everyday sleep into a rejuvenating journey of comfort. [ZIPPER CLOSURE, ONE SIDE SILK, NO SLIPPING ALL NIGHT]: 1 Peice Silk Pillowcase, Beautiful Eco Bag Package, 100% 19 Momme Mulberry Silk Side and 100% High Quality Cotton Underside; Zipper Closure to Prevent Slipping off the Bed(with Select High Quality Zipper to Avoid Any problem Which May Caused By Meltal), Standard Size 51x66cm(20"x 26"). [BREATHABLE, COMFORTABLE, HAIR & SKIN CARE] : Smooth, Soft, Breathable, Cool-to-the-touch. Perfect in Giving Silk Care to Your Face, Neck and Hair All-night. Waking up in Morning By Soft Silk Pillowcase Provides You A Good Mood At The Start of A Day! Silk never absorbs facial moisture. Great for Your Hair and Skin. [SMOOTH, COOL, TEMPERATURE REGULATOR]: Silk allow the skin and hair to slide over the pillowcase very gently and freely, reducing facial wrinkles, preventing dry/ knotted hair and reduce hair loss. Silk is also a natural temperature regulator which can adjust our skin temperature to an optimal level, ensuring deep sleep for all night.