Ever wonder why you wake up and your hair looks dry, tangled and messy? Thank your pillowcase for that. If it's made out of cotton, it's apparently a nightmare for your hair.
According to Cosmopolitan, celebrity stylist says;
"Cotton absorbs moisture, while silk retains it, so when you lie on a silk or satin pillowcase, the oils from your strands are maintained rather than soaked up, leaving your hair nourished rather than dry."
The silk pillowcases will also reduce hair breakage and split ends.
Be prepared to spend the $$ though. A package of 2 silk pillowcases can cost upwards of $100.