These are over priced, poor quality examples of a sofa bed. I paid extra for instructions at delivery and partial assembly for easier move into home. Delivery people knew nothing of this so sofa had to be put thru window a d I was not given instructions in how to remove arms for future moving. Sofa bed is as uncomfortable as any I've ever slept on. Mattress makes no difference in how uncomfortable the bar in your back is. Bed now sags down to floor under sofa, leaving integrity of seating completely compromised. Sitting anywhere other that far edges is like sitting in a canyon. Buy a reasonably priced sofa bed. When gets as bad as my Willow and Hall sofa bed, you will be able to afford a bra d new one. DONT WASTE YOUR MONEY