Cotton pillowcases create friction, leading to tangles and breakage. Switching...

https://www.bookmark-help.win/minimise-friction-while-sleeping-to-wake-up-with-less-frizz-rough-cotton-can

Cotton pillowcases create friction, leading to tangles and breakage. Switching to silk helps hair glide rather than drag overnight. For extra care, wear your hair in a loose, low plait or scrunchie while sleeping