Grinding your hair against a cotton pillowcase for eight hours is the fastest...

https://www.female.com.au/why-more-australian-women-are-rethinking-their-night-time-hair-care-routine.htm

Grinding your hair against a cotton pillowcase for eight hours is the fastest way to wake up with a total bird-nest. That constant friction causes breakage and frizz. Switching to silk or a loose scrunchie is an easy, low-effort way to save your ends.