Waking up with bedhead is often down to friction. Standard cotton pillowcases...

https://www.phone-bookmarks.win/ever-notice-your-hair-looking-messy-by-morning-that-s-friction-cotton

Waking up with bedhead is often down to friction. Standard cotton pillowcases can rough up the hair cuticle, whereas silk or satin helps strands glide. For an easy fix, try tying your hair into a loose bun or plait before bed to minimise overnight tangles