Traditional pillowcases don’t slip and aren't hair friendly. Over time, this causes damage to delicate facial skin and hair. Cotton scratches and tugs on skin, grabs and twists hair, resulting in visible skin stretching, sleep creases, damaged hair, possibly not maintaining your style by morning. Slip silk is so gentle, it allows skin and hair to glide across the surface protecting and hydrating skin, reducing split ends, and ensuring a longer-lasting blow out. Made using a trade secret production method developed over 10 years, Slip silk pillowcases provide the ultimate combination of shine, thickness, softness, and durability. Cotton is very absorbent, it can hold up to 27 times its own weight in water and it draws moisture away from your skin and hair. When you sleep on silk, delicate facial skin is more hydrated in the morning and hair becomes healthier over time. To ensure that your hair is being protected while you are resting and sleeping purchase the Silk pillow case by Slip for $99 online exclusively or via Sephora in Pink, Blue, Black, Caramel, White, or Gray.