This practice of roll-invert-unroll is very common in India. I recall putting on liners on beddings and blankets when I was ~6 year old in the 1990s.

I didn't realize until I saw comments that it's not the normal way here in western parts. I think may be hospitality industry may use it already and not commonly documented. Thanks for documenting it. Now I have a blog to point to when teaching my kids.

This is not a western parts thing, just one guy discovering something most consider common knowledge here.