Ever wonder why you wake up with a bird-nest? That is friction from your...

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

Ever wonder why you wake up with a bird-nest? That is friction from your pillowcase causing frizz and stubborn tangles while you sleep. Switching to a satin pillowcase is an easy, low-effort habit that prevents breakage