HOSPITOLOGY PRODUCTS Sleep Defense System - PREMIUM Zippered Bed Bug & Dust Mite Proof Box Spring Encasement & Hypoallergenic Protector - 60-Inch by 80-inch, Queen Polyester Independently lab-tested to be 100% Bed Bug Proof Stretchable 100% Polyester Knit fabric makes installation a breeze (Fits Box Spring Depths of 8" - 9") Double-hemmed binding stitch provides extra-durable seam construction and bed bug protection Help ease Asthma and other Respiratory conditions by blocking mold spores, dust mites, and other allergens that may come from your box spring 5-year Limited Manufacturers Warranty; Includes "Installation kit"