Patented complete encasement protection against bed bugs, liquids, allergens and dust mites, Laboratory-certified H2Pro® liquid-proof membrane is quiet and breathable, Moisture-wicking Tencel® fabric, Two pillow protectors, Omniphase™ phase change fabric absorbs and releases heat for a cooler sleep climate, Cooling Omniphase™ material, Tencel® fibers provide superior moisture-wicking properties, Zippered end for easy removal and laundering