Waking up to a bird-nest? It is usually just friction from your pillowcase...

https://www.hotel-bookmarkings.win/ever-wake-up-with-a-bird-s-nest-after-years-behind-the-salon-desk-i-know-your

Waking up to a bird-nest? It is usually just friction from your pillowcase causing unnecessary frizz and tangles. A silk pillowcase or soft hair-wrap is a total game-changer