The sofa bed is made of metal and plastic, and the frame is in the shape of a U. It can be adjusted to a flat surface, and has a drawstring around the bottom to keep it in place. The back of the sofa bed is lined with soft, high-quality fabric.For more detail you can visit our website.Website: httpswoodagesofacumbed.com/product-category/sofa-cum-beds/single-sofa-cum-beds/Phone -01179660829, 91 9818275708Mail- [email protected]