The sofa has a simple structure without a wooden frame. It consists of only 3 layers: a soft cover, an elastic lining fabric and a high-density foam layer. With a seat depth of 24.8"", the spacious design offers ample room for relaxation.Note: The dimensions of the sofa are: 98.43"" W x 45.52"" D x 33.86"" H. The material is: Polyester and Foam.Due to the use of high resilience foam, the cushion will expand somewhat slowly. The sofa requires around 3 days to completely expand. Gently patting the sofa during this period can accelerate its expansion.