These are the most economical allergy pillow encasings on the market, and provide complete protection against dust, dust mites, and their allergens. Using a unique combination of three bonded layers of engineered nonwoven fabric, these economy pillow covers are membrane-free and highly effective against dust mites, their residues, and cat danders. Lightweight and inexpensive, these encasements are ideal for college dorm rooms, travel, and anyone looking to combat dust mite allergens on a budget.