A mattress protector is a protective cover designed to fit over a mattress, safeguarding it from spills, stains, and allergens. Made from various materials, such as cotton or polyester, these covers can be waterproof or breathable, depending on their purpose. They help extend the life of a mattress by preventing damage and keeping it clean. In addition to protecting against spills and dirt, mattress protectors can also provide a barrier against dust mites and other allergens. This feature is particularly beneficial for individuals with allergies or asthma, as it helps create a healthier sleeping environment.