This waterproof and dust mite barrier zippered mattress enclosure covers all 6 surfaces of your mattress. Slide your mattress in and zip it up for complete protection. The exposed fabric is 80% cotton and 20% polyester terrycloth. The polyurethane back is non toxic and has food grade waterproofing. The pad is air permeable and is noise and odor free. We have a wide variety of sizes. If you need a different size just call us because we can make these any size.