Fully protect your mattress investment by using Protect-A-Bed AllerZip mattress protector. AllerZip mattress protectors give you complete mattress protection for a healthy, allergy-free sleep zone. Patented BugLock (US Patent 7,552,489); three-sided zipper and AllerZip seal gives you total protection against dust mites, allergens and bed bugs. AllerZip mattress encasement is completely Bed Bug entry, escape and bite proof. The AllerZip mattress protector provides your whole family with a clean and healthy sleeping environment. The smooth surface is waterproof and stainproof, featuring our innovative Miracle Membrane with the Total Heat Transference Formula. Liquids and stains stay out, yet the state-of-the-art AllerZip mattress protector remains breathable and comfortable.