A bed protector is a protective covering designed to shield a mattress from spills, stains, and allergens. Typically made from materials like cotton, polyester, or vinyl, these covers can help extend the life of a mattress by preventing damage from everyday use. They are available in various sizes to fit different mattress dimensions and can be easily removed for washing. In addition to protecting against spills, bed protectors can also guard against dust mites and bed bugs, making them a useful addition for allergy sufferers. Many bed protectors are waterproof, providing an extra layer of defense against accidents, especially for children or pets.