The Milliard Deluxe Four Inch Memory Foam Folding Mattress combines comfort and convenience in one luxuriously soft sleep solution. The three inch foam base is sturdy and built to last and the 1 inch memory foam top layer adds superior ergonomic comfort so you can have that perfect night's sleep whether you’re at home or on the go. The strong and soft cover is removable and machine washable for easy care. An internal layer of high-tech waterproofing means you can sleep worry free without the sweat and noise that traditional waterproof sheets are known for