We spend a third of our lives asleep, but pillows can be the enemy. Cotton...

https://telegra.ph/Why-Do-My-Curls-Lose-Definition-Overnight-The-Truth-About-Your-Sleep-Routine-06-06

We spend a third of our lives asleep, but pillows can be the enemy. Cotton causes friction, leading to breakage and frizz. Try a silk pillowcase, or simply secure your hair in a loose, low plait before bed to minimise overnight damage