The 3-piece mattress and pillow protectors encase every side of your bed and pillows, shielding them from bed bugs, dust mites, dirt, dander, allergens, and liquids. The encasement can hold mattresses or box springs, while the two pillow covers fit any standard-sized pillows, and all the protectors have zippered closures for maximum protection. Made with cotton fabric, this set of mattress and pillow covers are soft, breathable, machine washable, and completely waterproof without using noisy plastic lining.