Definition & Meaning of "fitted sheet"

What is a "fitted sheet"?

A fitted sheet is a type of bed sheet with elastic edges that are designed to stretch and fit snugly over a mattress. The elastic helps the sheet stay in place, preventing it from slipping off during sleep. Fitted sheets are typically used as the bottom layer of bedding, under blankets or comforters. They come in various sizes to match different mattress dimensions and are usually made from materials like cotton, polyester, or a blend. Fitted sheets provide a smooth and comfortable surface for sleeping.