Ever wake up looking like you fought your pillow? That is just friction-based...

https://www.4shared.com/office/RJmubNyege/pdf-7073-15703.html

Ever wake up looking like you fought your pillow? That is just friction-based damage. Tossing and turning causes the frizz and tangles you waste your morning fixing. Simple nightly habits like a silk pillowcase make a massive difference