A fitted linen sheet for a queen size bed.
Bedsheets serve to protect the mattress from stains and to increase the comfort of its occupants. There are two kinds of bedsheets: fitted and flat. Fitted sheets have their corners and sides equipped with elastic or a drawstring to "hug" the mattress, preventing it from sliding or moving off the bed. Because of their nature and design, fitted sheets are always used to cover the mattress, not the occupants.
Sold in bedroom furniture stores.