Zen Master Cotton Bed Bug and Dust Mite Mattress Protector helps eliminate bed bugs, dust mites, is water proof and hypoallergenic. This six sided bed bug protector encases the entire mattress and will eliminate passage of bed bugs in or out of your mattress. Serves as a means for treatment and prevention. Serious problems from your bed can be caused by bed bugs and dust mite infections. Mattresses and bedding are an ideal place for bed bugs to live and multiply. Human blood and body heat are the elements needed to attract bed bugs. Bed bug bites cause asthma, eczema and allergies to you and your family. By encasing your mattress, box spring and pillow, it is the best prevention you can take to stop the manifestation of bed bugs. Machine Washable in Cold Water and Tumble Dry on Low Heat.