A draw sheet is a tiny bed sheet that is draped crosswise over the center of a mattress's bottom sheet to cover the space between a person's upper back and thighs. Medical personnel frequently utilize draw sheets to cover patients when they are being moved out of their rooms. Cotton and polyester mixtures are commonly used. 42 x 72, 54 x 72, 54 x 81, and 54 x 90 are common Draw sheet sizes.