Night Therapy Spring 12 Inch Euro Box Top Mattress and BiFold Box Spring Set, Twin Pressure relieving comfort and support from Pocketed Springs, Foam and Fiber Quilted Euro Box Top Cover, and High-density foam layers Premium motion separation for an uninterrupted night's sleep Offers the look and functionality of a traditional box spring, but made from heavy gauge steel for longer-lasting durability No assembly required, simply open the box, slide the foundation out and unfold, it will immediately open to the shape of a box spring Mattress: Worry Free 10 year limited warranty BiFold Box Spring: Worry Free 5 year limited warranty