Sleep Tight -

Today, we have replaced ropes with coils and memory foam. We have largely relegated bedbugs to the history books (though they are making a comeback in travel). Yet, the phrase endures.

Science has moved past the idea that sleep is just "down time." It is actually a critical "housekeeping" period for the body. What Is The Meaning of Sleep Tight? | Sleep Matters Club Sleep Tight

The exact origin of "sleep tight" is a subject of debate, though two primary theories stand out: The Rope Bed Theory Today, we have replaced ropes with coils and memory foam