Maintain your mattress's quality, lifespan, and comfort with the Brookstone Ultimate Mattress Protector - Waterproof. CleanSense Allergen technology protects your mattress from allergens including pollen, pet dander, dust mites, while also protecting from odors and spills. Soft and breathable, this mattress protector fits mattresses up to 17in deep and is also ideal for your box spring. Easy care and machine washable.