This mattress has a fabric surface and is filled with superior sponges so as to allow you to sit or lie on it with a more comfortable experience. This sofa could be adjusted to five different positions. One position for sitting and the other position for lying. You could adjust the position as you like. This folding mattress sofa could not only be a sofa but also could be a bed. This sofa is equipped with a rigid steel framework and superior sponges can bear a max weight of 176lbs, combining comfort and robustness. It is great for apartment dwellers, college dorms, family dens, and when you're traveling or anywhere else space is limited.