Medline Ultrasorbs - Air Permeable Disposable Underpads have a moisture proof backsheet for superior skin dryness and comfort. The core is made from a thermo-bonded material that draws liquid away from the skin. These adult incontinence underpads also feature an AquaShield film that stops leaks, preventing you from having to change bedding. Ultrasorbs are ideal for use with low air loss mattress therapy. These underpads are available in multiple sizes to best suit your needs. Sizes: 18" x 24", 23" x 36"