If you’re waking up with tangled, frizzy hair, it’s usually down to friction....

https://www.bookmark-jungle.win/stop-waking-up-to-frizz-swapping-cotton-for-a-silk-pillowcase-minimises

If you’re waking up with tangled, frizzy hair, it’s usually down to friction. Standard cotton pillowcases tug at your strands, whereas silk allows hair to glide smoothly