Are you supposed to tuck in the top sheet?

A tucked-in top sheet keeps you warm and cozy.

When it's cold outside, it feels so good to get under the covers and tuck yourself in for the night. Being too cold can disrupt your sleep, so a tight-fitting sheet can hold in the warmth when it's chilly outside. (You can also do this by sleeping in socks.)

How do you sleep with a flat sheet?

Properly putting a flat sheet on your bed is a pretty simple task. When using the flat sheet over your mattress, it should fit snugly over the mattress. Close attention is needed to ensure that the flat sheet is tucked between the mattress and the box springs, so it will not come unattached while sleeping.