Durable Steel and Plywood With a Woven Fabric Cover DURABLY ENGINEERED - Thick plywood on the interior with 2.8 inch wood slats are covered in a durable woven grey fabric; supports any latex, memory foam or spring mattress CUSTOMIZE THE HEIGHT OF THE BED - With 3 different profiles available, you can choose to make your bed as high or low as you like; twin size can support upto 350 lbs, and all other sizes can support upto 700 lbs THOUGHTFULLY PACKAGED - All parts, tools, and instructions are packed into one compact box that ships straight to your door; easily assembles in less than an hour Worry-free 5 year warranty included; box spring only, a bed frame or platform bed is required to support this foundation and is sold separately