Waking up with knotty hair? It’s often friction against cotton pillowcases....

https://wiki-velo.win/index.php/Does_Your_Cotton_Pillowcase_Secretly_Sabotage_Your_Beauty_Sleep%3F

Waking up with knotty hair? It’s often friction against cotton pillowcases. Switching to silk helps, but my best tip is a loose protective style like a soft plait. It helps minimise tangles and breakage while you sleep