This product is a white pure silk pillowcase, 50 x 60 cm, with a hidden zipper. It has been clinically proven to reduce the appearance of fine lines, improve skin hydration, and enhance skin luminosity. Slipsilk, the material used, is designed to reduce friction and keep beauty products where they need to be, on the skin and hair. Recommended by dermatologists and laboratory tested, it is hypoallergenic and offers an exclusive beauty experience.