Abstract: Disclosed herein are systems and methods for supporting a patient, for example, for preventing or ameliorating pressure injuries or supporting a resting posture of a patient. The system can include a first layer comprising a sheet having a sheet length, a sheet width, and a vertical center line extending along the longitudinal axis of the sheet; a second layer affixed to the first layer, and longitudinally aligned with the vertical center line; and means for securing the first layer to a mattress and tensioning the second layer. The first layer and the second layer form a plurality of pockets disposed over the vertical center line, each respective pocket comprising at least one opening and configured to receive a pressure redistributing insert or a repositioning insert.