Ever wake up fighting a bird-nest? That is just friction against your...

https://wool-wiki.win/index.php/What_Are_the_Most_Common_Signs_My_Hair_Is_Breaking_From_Friction%3F

Ever wake up fighting a bird-nest? That is just friction against your pillowcase. Swapping to silk or a loose top-knot stops frizz and tangles before they start. It is a simple, practical habit that saves your hair from breakage while you sleep.