Prevail Air Permeable Low Air Loss Underpads. These disposable underpads promote good air circulation through the pad, while the diamond embossed back-sheet creates a higher integrity design. Designed for skin wellness, these underpads are suitable for use with therapy and low air loss beds. Prevail Air Permeable underpads are designed with integra mat bonding that bonding prevents separation and clumping, making them ideal for sleeping. Size: 30" x 36". 48/case.