Nod Off Quilted Waterproof Mattress Protector size super‑king protector features a deep fitted-sheet design with elasticated skirt that snugly wraps around mattresses up to approximately 30–40 cm thick, staying secure night after night.It offers a quilted, super-soft surface combined with a 100% waterproof backing to shield against spills, sweat, and stains—quietly and discreetly, with virtually no crinkle.The breathable, hypoallergenic materials help protect against dust mites and allergens while promoting airflow for a healthier sleep surface.