Dust mites and dust mite allergens, pet dander and pollen that hide in pillows and mattresses can't penetrate the Aller-Ease Classic pillow protector,offers soft and effective waterproof protection. Specially developed for allergy and asthma sufferers. Extends the life of your pillow. 20' x 28' fits standard and queen pillows. 20' x 36' full. 100% Polypropylene Film- 100% Polyethelyne Top Fabric- 100% Polypropylene Film- 100% Polyethelyne. Care Instructions - Machine wash cold. Tumble dry no heat (air only.), or Line dry Do Not Bleach. Do not iron. Imported.