Waking up with knots? Cotton pillowcases create friction that leads to...

https://zulu-wiki.win/index.php/Why_Does_My_Hair_Tangle_at_the_Back_of_My_Head_Overnight%3F_(And_How_to_Stop_It)

Waking up with knots? Cotton pillowcases create friction that leads to breakage. While silk helps, tying your hair in a loose, protective style is the easiest way to minimise damage. It’s a low-effort habit that makes morning styling so much smoother.