Waking up with knotty hair? It’s usually friction from cotton pillowcases....
https://mill-wiki.win/index.php/The_Beauty_Editor%E2%80%99s_Guide:_How_to_Create_a_Sleep_Environment_That_Supports_Hair_and_Skin
Waking up with knotty hair? It’s usually friction from cotton pillowcases. Switching to silk helps, but a loose braid is just as effective at protecting your ends overnight