Abstract: The invention is directed to articles, systems and methods for transforming inflatable bodies such as sleeping mattresses/pads into structures capable of functioning as elevated, ground supported seating surfaces. Article embodiments preferably include first end and second ends, characterized as solid or foraminous flexible panels and/or strap-like webbing each preferably having a peripheral compression portion, each positioned proximate to respective first and second edge portions of a cylindrically involuted inflatable mattress by compressively restraining differential axial displacement between adjacent major edge portions and overall radial expansion thereof. At least one linking portion links the first end to the second end, and preferably is adjustable to accommodate cylindrical mattresses of disparate widths. The ends may further include padding and/or enhanced water repellancy.