Rest easy with the powerful protection of the allergy-free zipper mattress encasement. The intelligent 6-sided Miracle Membrane guards against dust mites and other allergens, including mold, mildew, pet dander, and pollen. And the 3-sided Bug Lock® Secure Seal zipper ensures bed bugs can’t enter or escape. Nothing’s getting through, and yet its breathable design will keep you cool throughout the night for a peaceful, healthy sleep