The HyperChill™ Pillow Protector offers reliable waterproof protection and cooling technology. Innovative HyperChill™ fabric continually dissipates body heat for a comfortable sleep climate. The lab-certified H2Pro® barrier protects pillows from fluids, stains, dust mites and allergens while allowing air to permeate for comfortable breathability. Pillow encasement has a zippered end for a secure fit. Set includes two pillow protectors.