The sofa transforms easily using the Clic-Clac method into an appealing sofa bed, making it ideal for overnight guests and sleepovers. The ergonomic sofa bed is constructed of 3-position seat-to-backrest angle adjustment. A 105-degree angle provides your back a slightly reclined position healthy to your back on regular basis. A 138-degree reclining position might put the least stress on the spine and help reduce the risk of back pain. 180-degree flat lying makes occasional couch sleeping commodious. You can always adjust it to the most comfortable angle as you need. This item comes flat packed and will require self-assembly. Full hardware and easy to follow instructions are included.