Our softest ever knit sheets are thick, durable and naturally stretchy so they conform and recover for a perfect fit. 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. SmartFit™ design keeps your sheets snug and secure Make your bed quickly by aligning the Logic™ labels on all Sleep Number® bedding. All fitted sheets except for FlexTop™ sizes have two Logic™ lables, one at the head and one at the foot fo the sheet to allow for fortation for the best care of your sheets. Our sheets are designed to fit any mattress up to 15" mattress thickness. Learn more about or watch our . Pair with our exclusive blankets and duvet covers for a signature style all your own.