88% Polyester ,12% NylonCOMPLETE ALLERGEN PROTECTION: If you wake up congested, it could be allergens in your pillows. Our pillow protectors offer complete barrier protection, blocking dust mites, pet dander, bed bugs and other common household allergens.TEMPERATURE BALANCING TECHNOLOGY: You??ll never be too hot or too cold with these pillow protectors! The temperature balancing technology adjusts continuously to your body temperature so you are always cool and comfortable.EXTEND PILLOW LIFE: Fully encasing your pillow with a durable and comfortable zippered protector not only protects against household allergens, it extends the life of your pillow by keeping it fresh and clean.PREMIUM QUALITY: These pillow protectors breathe naturally and don??t trap body heat or moisture like vinyl or plastic. They also include an antimicrobial fabric finish to prevent odors and are soft and comfortable.LEADING BRAND OF ALLERGEN BARRIER BEDDING: All AllerEase products provide natural allergy relief, are allergist recommended, and have a 10-year limited warranty. Customer satisfaction is important to us.