From Slip, this pillowcase features: Why switch to a slip pure silk pillowcase? Real results, real benefits in just 4 nights! Clinically shown* to visibly improve: the appearance of fine lines skin hydration skin texture and smoothness skin radiance, luminosity, or brightness Over 95% of users agreed sleep creases, sleep lines and sleep wrinkles were fewer and less noticeable.*Dermatologist recommended.**The beauty secret of celebrity hairstylists, dermatologists and beauty experts. THE SLIPSILK DIFFERENCE: 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. 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 BED HEAD: Ordinary cotton pillowcases can cause hair tangling during the night. In laboratory testing, slipsilk has been shown to reduce friction by 43% on average. *Based on a study (clinical grading and consumer perception) of over 100 women, aged 35-65, who were regular users of cotton or synthetic (non-silk) satin pillowcases. Clinical grading showed statistically significant improvement. Individual results may vary. Compared to widely available cotton pillowcases with a 220-360 thread count. Care instructions: Hand wash 30°C (86°F) Machine wash 30°C (86°F) (Delicates wash bag recommended) Use a pH neutral liquid detergent Line dry in shade Iron or steam on a low heat Dry clean (No trichloroethylene) Do not bleach Do not tumble dry