Pillow encasements are engineered with the same quality features that make all of our encasement products best-in-class and include our patented Zip-N-Click closure device, making them 100% bed bug proof. They will also enhance quality of sleep, as they block out dust mites, mold spores, allergens and other irritants, thanks to our proprietary MicronOne technology. CleanRest Pillow encasements are also machine washable.