Slip products are all made with slipsilk that has been developed and refined for over 10 years to provide the ultimate combination of shine, thickness, softness and durability. Slipsilk was shown in a laboratory test to absorb less face cream and create 43% less friction on the hair and face than normal cotton pillowcases. Slipsilk products are ideal for anti-aging, anti-bedhead, anti-sleep crease and to create optimal comfort for sleep.