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

https://www.active-bookmarks.win/grinding-your-hair-against-a-cotton-pillowcase-for-eight-hours-is-the-fastest

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