Fitted sheet什麼意思

"Fitted sheet" is a type of bed sheet that is designed to fit snugly over the mattress, usually with elastic edges that stretch around the perimeter of the mattress to hold the sheet in place. This makes it less likely for the sheet to come off during the night or when making the bed. Fitted sheets are available in various sizes to fit different mattress dimensions, such as twin, full, queen, and king. They are commonly used in conjunction with top sheets and flat sheets to make a bed.