Waking up with knotty hair usually comes down to friction against your...

https://www.play-bookmarks.win/cotton-pillowcases-create-friction-leading-to-breakage-switching-to-silk-lets

Waking up with knotty hair usually comes down to friction against your pillowcase. Cotton can be rough, whereas silk lets hair glide. Beyond bedding, try a loose braid or bun to keep ends protected overnight