Ultimate Sleep Experience Every Night：BYDHZN pillowcases are made of 23 momme Grade 6A mulberry silk fabric, rich in 18 amino acids, which are believed to effectively stimulate the metabolism of skin cells, to keep your skin retain moisture, to relieve hair breakage and hair loss. Ideal for those seeking cooling in summer and warm in winter, it naturally regulates temperature and moisture for a restful night's sleep, offering extreme smoothness and softness for your luxurious and indulgent sleep experience Hair and Skin Benefits: The mulberry silk pillowcase has been tested by beauty experts to protect your hair from getting knotted, reducing hair loss and shining naturally and healthily. Our cooling pillow cover has also been proven to prevent fine lines and dry wrinkles and reduce stretching and pulling on delicate facial skin. Say goodbye to restless nights! Let's enjoy beautiful sleep Hidden Zipper Design: Featuring an invisible zipper design keeps the pillowcase seamless, allowing this silk pillowcase to perfectly support your pillow at night without moving the zipper. The smooth hidden zipper closure is used to open and close the pillowcase, ensuring a seamless look and feel. These pillowcases are carefully crafted by professionals with perfect and reinforced bottoms, sturdy stitching without loose threads. This elegant design choice not only enhances the aesthetic appeal but also contributes to the pillowcase's longevity and ease of use Temperature regulator: Silk's natural temperature-regulating feature keeps you comfortable in every season. Silk is cool in summer and warm in winter. It can effectively reduce hot or cold irregularities when sleeping by wicking moisture from the body and adjusting to body temperature, which helps you maintain a comfortable sleep state Perfect gift choice: We hope you and your family have a sweet and comfortable sleep. The best gift choices for Thanksgiving, Christmas and Valentine's Day. If you have any questions, please feel free to email us and our customer service team will work with you to solve any problems you encounter BYDHZN 100% Pure Silk Pillowcase 2 Pack for Hair and Skin, Both Sides 23 Momme Grade 6A+ Mulberry Silk Pillowcases with Hidden Zipper, Soft&Smooth Cooling Pillow Cases