EBayFabric Type Polyester Special Feature Durable,Waterproof About this item Polyester PROTECT YOUR WHOLE BED – We often worry so much about protecting our mattresses, but we neglect buying a protector for our box springs. Your box spring is just as susceptible to moisture and water damage as your mattress, so why not protect it with our zippered encasement. ZIPPERED PROTECTION - With our super zipper closure fully encasing your box spring, everything will stay out completely! Our smooth gliding, tight locking zipper will protect your box spring on all six sides. PERFECT FOR HUMID CLIMATES – High heat and humidity can allow moisture to collect inside your box spring, causing major damage. Why risk damaging your box spring when you could protect it instead? WATRPROOF PROTECTION –Smooth, soft and durable fabric material backed by a waterproof inside layer. Featuring a zipper closure, it will prevent harm and damage to your box spring. EASY CARE – Machine wash in cold water with mild detergent. Tumble dry and remove promptly when done. Do not iron or apply heat, as it could damage the waterproof layer.