CleanRest PRO Max Mattress Encasements are designed to outlast the mattress it’s protecting. Utilizing patented MicronOne fabric technology, this 4-sided waterproof sleep surface blocks stains, wetness, bed bugs, dust mites, and other allergens while enhancing quality of sleep with its soft, quiet, and breathable material. Waterproof top, bottom, and long sides of mattress make this product ideal for flippable mattresses. Vented head and foot panels allow for maximum airflow. These zippered encasements feature a patented Zip-N-Click closure device and are backed by a 10-year full product warranty. The Twin XL-sized encasement measures 39x80" and features a stretchable sidewall to accommodate mattresses ranging from 7-12” deep.