Includes two pillow protectors with zippered enclosure, 100% waterproof barrier, Laboratory-certified H2PRO membrane allows air passage but repels liquids, Accomodates all pillow depths, Includes TWO pillow protectors with zippered enclosure; universally accomodates all pillow depths, Hypoallergenic, breathable and smooth polyester surface is noiseless, will not change the feel of your pillow and naturally wicks away moisture, Great for asthma, eczema and allergy sufferers - vinyl, PVC and phthalate free