Waking up with tangles? It’s likely friction against your cotton pillowcase....

https://noon-wiki.win/index.php/Why_Does_Chemically_Treated_Hair_Get_Worse_with_Cotton_Pillowcases%3F

Waking up with tangles? It’s likely friction against your cotton pillowcase. Switching to silk reduces drag, keeping hair smooth. For extra protection, try a loose braid or silk scrunchie to minimise movement overnight