100% Polyester satin : Satin pillow cases for skin provide a perfect slip and smooth texture to protect your skin against the facial sleep lines that could become deep wrinkles – Maintain your skin soft and moisturized to beautify your face – Sleep on a satin pillow case can reduce friction to protect your eyelashes from creasing and stay healthier.Available in TAOSON Satin Pillowcases Set of 2, Pillow Covers with Envelope Closure, King Size 21x36Inch,Fits 20 x 36 pillows , 21 x 36 pillows(Pillows are not included.)All four sides finished with 2 flange add beauty, the internal stitching has an envelope style tuck flap on the back. Which insures that the pillow fits perfectly into the cover, and protects your pillow not be dirty. ,Envelope closure end design prevents your pillows escaping from pillowcase during your sweet dream – No zipper with easy on and off design to bring you a unique and pleasant experience.Care Instruction – wash before using.normal cycle on warm or cold setting.do not bleach,soak or wring. safe to use in dryer on lowest heat setting.may bline dried. cool iron on reverse if required.100% MONEY BACK GUARANTEE,If not completely satisfied, return with no-questions asked.