A Bedsheet Is A Fundamental Piece Of Bedding, A Rectangular Cloth That Is Placed Directly On Top Of A Mattress. Its Main Function Is To Provide A Comfortable, Smooth, And Clean Surface For Sleeping, Protecting Both The Sleeper From The Mattress And The Mattress From Dirt And Oils. Bedsheets Come In Two Main Types: The Flat Sheet, Which Is Placed On Top Of The Fitted Sheet, And The Fitted Sheet, Which Has Elastic Corners To Securely Hug The Mattress. The Quality Of A Bedsheet Is Often Judged By Its Thread Count, Which Indicates The Number Of Threads Woven Into A Square Inch Of Fabric. Higher Thread Counts Generally Mean A Softer And More Durable Sheet. Common Materials Include Breathable Cotton, Luxurious Egyptian Cotton, Soft Flannel For Warmth, And Silky Sateen. Choosing The Right Bedsheet Is Crucial For A Good Night'S Sleep As It Is The Layer Of Bedding That Is In Direct Contact With Your Skin Throughout The Night.