Experience the anti-aging anti-sleep crease and anti-bedhead benefits of a Slip pure silk pillowcase.Made with 22 momme mulberry silk Slipsilk pillowcases have been shown in laboratory testing to absorb significantly less face cream than cotton helping to keep your skins moisture and valuable products where they belong.The smooth surface of Slipsilk reduces friction allowing skin to glide along the pillow and minimizing pressure on creased skin.Additionally Slipsilk reduces friction on hair by an average of 43% compared to cotton pillowcases minimizing stretching and tugging that can lead to damage.Unlike cotton or satin Slipsilk is a specially commissioned and refined material developed over ten years to provide the ultimate combination of shine thickness softness and durability.Available in queen and king sizes with either a zipper or envelope closure these washable silk pillowcases are the #1 preferred brand recommended by dermatologists for their patients themselves and their families.