Slip® is the #1 preferred brand of silk pillowcases by dermatologists for their patients, themselves and their families** The beauty secret of celebrity hairstylists, dermatologists and beauty experts. 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 AGEING: 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 pillowca