Waking up with knotty hair? It’s often friction against cotton pillowcases....

https://www.4shared.com/office/pcYDzaBAjq/pdf-88397-12006.html

Waking up with knotty hair? It’s often friction against cotton pillowcases. Switching to silk helps, but my best tip is a loose protective style like a soft plait. It helps minimise tangles and breakage while you sleep