The PROCare Underpads feature four layers of protection. The top layer is a soft, quilted cotton/polyester surface that is soothing against the skin. The second layer is a soft, polyester fiberfill layer for extra cushion. The third layer is the super absorbent, high-density layer that wicks away moisture throughout the night. This quick absorption is a crucial step for protection the skin. Extended exposure to moisture can cause painful skin deterioration. Placing these absorbent underpads beneath the patient prevents this deterioration. The fourth and final layer is a vinyl, waterproof non-slip barrier. This non-slip backing will help to keep the pad in place throughout the night.