Silk is composed of protein fibers, has excellent biocompatibility with the human body, has a soft and smooth surface. Its friction coefficient to the human body is the lowest in all fibers, only 7.4%. It is really the best choice for people who have sensitive skin. Superior durable plain color, exquisite craftmanship of the neat stitches, light weight and easy to carry. It’s smooth and silky surface helps you to sleep well overnight and enjoy dreams, sleep like a baby. Hidden zipper for style comfort and better fit, prevents slipping out and ensures that the pillow stays perfectly in the pillowcase.Hidden zipper at the end allows you to fit the pillow into the silk pillowcase easily.