Simmons BeautySleep Siesta Memory Foam Mattress: Roll-Up Guest Bed/Floor Mat, 3" Twin Lightweight mattress instantly provides a comfortable sleeping space or lounging solution Features 3" thick plush memory foam, which consists of both memory foam and comfort foam; Twin size mattress measures 75" L x 31" W When not in use, it conveniently rolls up to just 12" in diameter, allowing for a hassle-free transportation and compact storage Includes a nylon carrying bag and a removable, ultra-plush machine-washable cover Use for camping, sleepovers, dorm rooms, playrooms, guest beds, and as a mattress topper