100% silk front +100% cotton backImportedNATURAL SILK MATERIAL: the outer layer of silk pillowcase is 100% 20 Momme natural silk( which can touch your skin directly ), smooth, comfortable and soft for your hair and skin, which can reduce the wrinkles of your face; the inner layer( which won?@t touch your skin directly when you sleep) is 100% cotton , which can prevent your pillow slip out from the pillowcase.ENVELOPE DESIGN: the envelope design at opening is very convenient, suitable for most pillow size. easy to use, and easy to disassemble too. This envelope design can effectively avoid the hidden zipper tearing the seam of the pillowcase, thus extending the life of the silk pillowcase.GOOD FOR HEALTH AND BEAUTY: Our silk pillowcase has passed the SGS and INTERTEK audits. All our material are pure and natural silk, cotton, no chemical fiber filled, hypo-allergenic for most of people, please feel free to use it. The natural silk contains sufficient natural protein fibers, which can prevent body aging, and beautify your skin, good for your hair.HOW TO MAINTAIN: Dry clean or hand wash suggested .The water temperature should not exceed 30 celsius, when hand wash, do not twist, use special silk detergent or shampoo, shower gel, add a spoonful of white vinegar will be more softer, press the excess water when finished. Do not expose to high heat, hot water, Chemicals.OUR PACKAGE AND SERVICE??Package: You will receive 2 packs Since Silk silk pillowcases; if you have any question about the product, please do not hesitate to ask questions.