Bed pads, also known as underpads or chux, are highly absorbent sheets designed to protect mattresses and furniture from moisture damage caused by incontinence, spills, or medical procedures. They typically feature a multi-layered construction consisting of a soft, non-irritating top layer for skin comfort, a thirsty core—often made of fluff or super-absorbent polymers—and a waterproof backing to prevent leaks. Available in both disposable and washable reusable formats, these pads offer a practical and discreet solution for maintaining hygiene and extending the lifespan of bedding in home care, clinical, and even pet-training environments.