<br><b>Material: Mulberry Silk</b><br> <br>This mulberry silk pillowcases have the following characteristics:<br><br> <br>1.Mulberry Silk, 4Pack. smooth and soft. Mulberry silk is a born thermoregulator which keeps you cool in the summer and warm in the w Silk fabric has 18 kinds of Amino acids that are believed to effectively promote your skin cells' metabolism, silk never absorbs facial moisture. <br> <br>2.Both sides of the pillowcase is organic silk. Light weight and easy to carry. <br> <br>3.Superior durable plain color, not easy to run after washing. Exquisite craftman ship of the neat stitches. <br> <br>4.Mulberry Silk can Prevent Wrinkles, Regulate Sleep Temperature, Protect Hair Damage & retain mositure.<br> <br>5.Hidden zipper closure design makes the silk pillowcase hold your pillow perfectly overnight without move around, improving the same time your life quality.<br> <br>6.If you have any other questions, pls feel free to contact us by Email, we will do our best to solve your problem :-)<br><br> <b>Washing and Care Instructions:</b><br><br> <br>Hand wash in cold or lukewarm water with mild detergent.<br> <br>Do not soak dark-colored silk for more than three minutes.<br> <br>Do not twist or wring, hang dry.<br> <br>Do not dry in direct sunlight.<br> <br>Do not tumble dry.<br> <br><b>Note: The silk pillowcase may be wrinkled in long-term storage. It is recommended to use a steam iron or garment ironing machine before ironing at low temperature before using it. (Multiple ironing is not recommended)<br>