Ever wake up with a bird-nest? That is just friction from your pillowcase...

https://www.4shared.com/office/RJmubNyege/pdf-7073-15703.html

Ever wake up with a bird-nest? That is just friction from your pillowcase causing frizz and knots. A silk cover or loose braid before bed protects hair while you sleep. It is a low-effort habit that saves you time every morning