Utopia Bedding Zippered Box Spring Encasement Ample Zipper Opening for Easy Use - Water Resistant Cover, Ultimate Protection Against Insects, Dust Mites and Allergens (Full) Full size encasement measures 54 inches by 75 inches with 9 inches box for oversized box spring Zippered box cover secures the box spring from 6-sides and keeps bedbugs from entering or escaping A zip guard and double hemmed binding stitch with 5 thread lock provides extra durable construction and bed bug protection High-tech engineered non woven fabric repel water and protect your springs from rust Also proctects from allergens and other bacteria and fluids