Stay warm with these irresistibly soft sheets. High-quality microfiber is non-pilling for lasting comfort.ExactFit™ sheet design allows our sheets to stretch and move with our unique smart beds as they flex, and recover between uses, for a smooth, perfect fit.With our SmartFit™ design, sheets stay secure all night. A fully elasticized edge, elastic corner seams and anchor bands keep fitted sheets in place.Logic™ Labels on Sleep Number® bedding make it easy to see which way your bedding fits, right from the start. Simply align the labels at the bottom right corner for easy bed-making. Includes:One oversized flat sheetOne fitted sheet (Split King and Split California King sets contain two Twin Long fitted sheets)Two pillowcases (Twin and Twin Long include one pillowcase)Learn more about how to find the right sheet or watch our how-to videos. Winter Soft™ sheet set