SIZE & DEPTH: This Guardmax Mattress Encasement fits a Full Size Mattress that measures 54 x 75 x 9. It stretches to fit a mattress with a depth up to 10 inches. HEAVY DUTY VINYL: The Guardmax Mattress Encasement is heavy gauge vinyl in order to provide ultimate protection. Your mattress will be fully encased, providing 360 degree zippered defense against accidents. 100% WATERPROOF MATTRESS PROTECTOR: The Guardmax mattress protector does exactly that. It protects your mattress against any and all liquids. Whether it is a drink or urine no liquid spill will penetrate through the heavy gauge vinyl WATERPROOF PROTECTION –Smooth, soft and durable vnyl material backed by a waterproof inside layer. Featuring a zipper closure, it will prevent harm and damage to your box spring. ZIPPERED MATTRESS PROTECTOR: The Guardmax Mattress Protector is made with a nylon coil zipper, which will prevent the zipper from trapping or snapping as is the case with other mattress encasements on the market. If there was such a thing as state-of-the-art zippered technology. Guardmax's mattress encasement would be it. It is a zipper made with durability in mind. Waterproof mattress encasement keeps your mattress safe from spills, sweat, and urine. This waterproof protector is made of high-quality materials that do not absorb liquids and are easy to clean. Its smooth gliding, tight locking zipper will keep your mattress securely protected on all six sides. Just place them over top of your mattress and enjoy worry free night's sleep as moisture will not collect in your mattress