The Slipsilk™ Difference: Slip pure silk products are made using slipsilk™. Specially-commissioned and made to our exacting standards, slipsilk™ has been developed and refined for over ten years to provide the ultimate combination of shine, thickness, softness and durability. Anti Aging: We spend a third of our lives in bed. In laboratory testing, slipsilk™ pillowcases were shown to absorb significantly less face cream than cotton pillowcases, so they can help keep your skin's moisture and valuable face and hair products where they belong, on your face and hair. Slipsilk™ was also shown to create 43% less friction on average, which can reduce stretching and tugging on delicate facial skin. Anti Sleep Crease: Slipsilk™ has been shown to reduce friction by 43% on average, allowing skin to glide along the pillow, which can reduce pressure on creased skin. Anti Bed Head: Ordinary pillowcases can cause hair tangling during the night. In laboratory testing, slipsilk™ has been shown to reduce friction by 43% on average. Zip closure Highest grade (6A) long fiber mulberry silk with a thickness of 22 momme Machine wash Imported SIZING 20"W x 30"L. Cosmetics - Beauty Accents > Saks Fifth Avenue > Barneys. slip. Color: Rose Gold.