The Slip Pure Silk Pillowcase, 80 x 80 cm, with a hidden zipper is designed to provide anti-aging, anti-sleep creases, and anti-flat hair benefits. Made from Slipsilk, which has been developed over 10 years, this pillowcase significantly reduces the absorption of face creams, keeping skin and hair hydrated. Clinically tested to improve skin appearance, with a reduction in fine lines and increased hydration, over 95% of users noticed improvements. Recommended by dermatologists, this pillowcase is also hypoallergenic and the beauty secret of many experts.