The Sealy Allergy Advanced Zippered Mattress Protector is designed to keep your mattress safe from more than just regular wear and tear. It adds an allergen barrier that prevents the collection of dust mites and household allergens in your mattress. The quiet, waterproof layer helps to ensure that spills and stains do not damage your mattress. The six sided zippered construction is also designed to prevent bed bugs from entering or exiting the encasement. This comfortable, soft top, protector is easy to install and is machine washable for easy care. Complete the collection by adding on the Sealy Allergy Advanced Zippered Pillow Protectors, sold separately.