Clean Rest SimpleWater-Resistant, Allergy and Bed Bug Blocking Pillow Encasement, Queen 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. Fully zippered encasement. 2 year warranty Queen pillow encasement fits 20"x30"