It enjoys very low head tube in close position to increase about 30% container loading capacity for finished sofa bed. Move the cross bar to pillow area for the sleeping comfort. It enjoys very small clrearance between armrests and mechanism for better comfort and safety. It is partly assembled to save shiping cost but it is very easy for customers to put together. It has low leg and high leg versions. Pillow area and seat area are all webbing constructin for comfort. Body area is no sagging construction by metal grid for comfort. Easy to open and close