This Sealy Posturepedic Advanced Protection Mattress Cover provides protection from dust mites, pollen, bed bugs, pet dander and other household allergens that can trigger allergies. This six-sided mattress cover is made of comfortable soft-top fabric that fully encases your mattress with a durable, zippered closure that is bed bug escape- and entry-proof. Waterproof protection prevents spills from ruining your mattress.