Keep your mattress clean and safe when you move. The LUCID Ultra Heavy Duty Mattress Bag is made of heavy weight 6 mil polyethylene rip resistant material. Designed to fit all mattress types, it slides over a mattress or box spring and seals shut with a flap and double adhesive strips. It completely covers your mattress to block out moisture, dirt, bugs and pests while in transit or in storage. This heavy weight bag is also a great solution for disposing of a mattress infested with bed bugs.