Protect-a-Bed BugLock Economy Encasement, Twin Polypropylene Imported Twin Size: 38 x 75 in., Fits bedding up to 8.5 in. high. Patented BugLock Zipper with Secure Seal prevents bed bugs from entering or escaping. Miracle Membrane sleep surface prevents bed bugs from feeding through fabric. Breathable Barrier: NOT hot to sleep on. Allows body vapor to breathe through lining. Easy to Wash and Use: Wash in warm or hot water. Tumble dry on medium heat