Bedbug cover is highly recommended. It protects the mattress, is water resistant, durable, and long lasting. The Aller-Zip smooth mattress or box spring encasement keeps your sleeping area clean, allergy-free, and bed bug-proof for a healthy night’s rest. Total coverage solution wraps your mattress with 6-sides of waterproof miracle membrane protection. With a waterproof Miracle Membrane that has passed the CDC standard for viral penetration (ASTM F1671), it provides the highest level of barrier protection (level 4). The miracle membrane barrier also promotes a healthy sleep environment by protecting you from dust mites and other allergens that may lurk in the mattress, including mold, incontinence, accidents, mildew, pet dander, and pollen. The patented bug lock secure seal with a three-sided zipper is bedbug escape and entry proof for true peace of mind.