The frame of the sofa is made of wood and chipwood. The mattress is made of highly elastic foam HR to allow excellent flexibility of the sitting and sleeping area. Assembling do not take more then 40 minutes, Solid + Manufactured Wood, The frame of the sofa is made of wood and chipwood, The mattress is made of highly elastic foam, The mattress of this sofa is firm, The overall dimensions can vary between 2-5 cm, This sofa is universal so you have to specify whether you require. - OLYMPIA FURNITURE Original Berlin Black/Grey Sofa - Universal Side Sofa Bed - Corner Sofa - Sofa Bed With Storage