The pillowcase One Side with 100% 19 momme Mulberry Silk,a sensuously smooth, hypoallergenic and breathable natural, organic fiber; Another side is 100% Cotton to prevent slipping Anti-Ageing & Hair Frizz - Superb anti wrinkle skin care product which stop your face and hair from drying out. Hidden zipper closure at the side to prevent slipping. and for style, comfort and better fit. OEKO-TEX standard 100 certified To Be Free Of Chemicals And Naturally Dyed With No Color Shading Or Fading. Easy Care:Hand or Machine Wash in Cold Water on Gentle Cycle. Hang to Dry. Cool Iron. Do Not Bleach. Can Also Be Dry Cleaned.