As someone who spent nine years sweeping up hair at the front desk, I know...

https://outstanding-track-0dc.notion.site/Let-s-be-honest-your-pillowcase-might-be-ruining-your-hair-Friction-creates-377fc8161d5980ceb746f2a7ea817fff

As someone who spent nine years sweeping up hair at the front desk, I know exactly what happens when you hit the pillow with loose hair. It is all about friction