This Tena Protective Bed Pad is made with a Super Absorbent Polymer Core to help wick away moisture into the underpad, reduce odors, and control bacteria. Waterproof back sheet offers protection for accidental urine loss and other potential spills during hygiene procedures. The moisture proof lining traps liquid to better protect beds and chairs and keep them dry. Mats are single-use, dispose after it becomes soiled. Measures 30" x 30".