Waterproof mattress covers are protective layers designed to keep mattresses safe from spills, stains, and allergens. Made from materials like vinyl or polyurethane, these covers create a barrier that prevents liquids from seeping through, helping to maintain the mattress's cleanliness and longevity. In addition to protecting against moisture, waterproof mattress covers can also guard against dust mites, bed bugs, and other allergens. They are easy to clean and can be machine-washed, making them a practical choice for households with children or pets, where accidents are more likely to occur.