This is the piece of fabric that creates a sheath or barrier between you and your pillow. Typically, a pillowcase has one opening on the short side of the fabric and extra fabric that will drape over a few inches, when placed over the pillow insert. The drape is sometimes generous and provides a decorative element to what is otherwise a largely functional piece.

 Flannel sheets, on the other hand, are great for keeping warm during the colder months. Flannel sheets are made of cotton or wool and are known for their softness and insulation.  When choosing flannel sheets, pay attention to the weight of the fabric, as heavier weights are generally warmer and more durable.  Choose flannel sheets that weigh 5 ounces or more for a comfortable and long-lasting option.