Abstract: A beddress. Under one embodiment, a beddress includes an upper fabric portion sized and shaped to cover an upper surface of a top mattress structure and a lower fabric portion sized and shaped to cover at least three side surfaces of a bottom mattress structure. The upper and lower fabric portions are securably coupled together at an interface so that the coupled portions are installable over the top mattress structure as a unitary covering. The interface is positioned to fit between the top and bottom mattress structures.