The Encase Hd Mattress Protector will completely protect all sides of your mattress and can help eliminate bed bugs. The Encase is backed by the laboratory certified H2Pro Membrane has microscopic pores that allow air to permeate while blocking larger molecules like liquids, viruses, bacteria, dust mites and allergens, creating a liquid proof, noiseless and breathable barrier. Pillow protectors are also available to create a healthy sleeping environment.