Product Details Why switch to a slip pure silk pillowcase? Real results, real benefits in just 4 nights! Slip is the 1 preferred brand of silk pillowcases by dermatologists for their patients, themselves and their families.; Slip pure silk products are made using slipsilk, developed and refined for over ten years to provide the ultimate combination of shine, thickness, softness and durability. ; We spend a third of our lives in bed. In laboratory testing, slip pure silk pillowcases were shown to absorb significantly less face cream than cotton pillowcases, so they can help keep your skins 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. ; 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. ; Ordinary cotton pillowcases c