Stop waking up to bedhead. Cotton pillowcases cause friction, leading to...

https://research-wiki.win/index.php/Protect_Your_Investment:_The_Ultimate_Guide_to_Bedtime_Hair_Care_for_Short_Styles

Stop waking up to bedhead. Cotton pillowcases cause friction, leading to breakage. Try a silk or satin case instead, and tie your hair in a loose, comfortable style before bed to minimise morning tangles