A mattress cover is a protective layer that fits over a mattress, designed to shield it from spills, stains, and allergens. It can help extend the life of the mattress by preventing wear and tear, making it a practical addition to any bed. Many mattress covers are made from materials like cotton, polyester, or a blend, and some are waterproof or hypoallergenic. They are easy to remove and wash, ensuring a clean sleeping environment. Using a mattress cover can enhance comfort and hygiene, contributing to better sleep quality.