AllerEase Allergen Barrier Pillow Protectors &ndash; Waterproof Zippered Pillow Protectors, Allergist Recommended, Prevent Collection of Dust Mites and Other Allergens, King Sized, Set of 2 100% Polyester Imported COMPLETE 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 and other common household allergens. ALLERGIST RECOMMENDED: Our pillow covers are designed to help allergy and asthma sufferers who are sensitive to common triggers. We combine superior filtration with waterproof protection for the ultimate in protection. 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, keeping it fresh and clean. PREMIUM QUALITY: These pillow protectors have a 220 thread count and are 100% polyester for a soft, smooth look and feel. Best of all, they are noiseless. 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.