Protect your mattress investment with this cover that has the protection of vinyl and the comfort of cotton. Made from 100% micro-denier polyester with a micro-porous membrane, it is washable, breathable, waterproof, and prevents the transmission of dust mites, mold spores, pollen and other allergens from your mattress to you. Zippered for 360 degrees of protection, it totally encases your mattress, breathes naturally and provides a comfortable, waterproof sleep.