Protect-A-Bed BugLock Plus Bed Bug Mattress Encasement, Twin XL Fits Twin XL size mattresses 6 to 10 in. high. Dimensions: 38x80 in. Polyurethane Miracle Membrane lining on top sleep surface is also waterproof. BugLock with Secure Seal locks bed bugs in or out protecting your mattress. Stretch-knit side panels allow for easy installation Machine washable in warm or hot water. Tumble dry on medium heat. Do not bleach or dry clean.