Designed for both comfort and protection, the Simmons Oops Waterproof Mattress Protector fits most standard crib mattresses and offers a soft, breathable sleep surface. Crafted with a blend of organic cotton and polyester, it’s hypoallergenic, waterproof, and dust mite resistant—keeping your baby’s mattress safe from spills and allergens. With a 3-year manufactures warranty, this mattress cover ensures lasting quality and peace of mind.