Clean Rest Pro Waterproof, Allergy and Bed Bug Blocking Pillow Encasement, King 100% Microlux Imported Micronone fabric technology provides a breathable barrier that blocks bed bugs and all micro-toxins larger than one micron like dust mites, mold spores, pet dander and pollen Patented zip-n-click closure prevents bed bug migration Micronone microplush fabric is waterproof 10 year warranty King size pillow encasement fits 20x36