Solid pine and engineered wood frame with reinforced joinery. All wood is kiln-dried for added durability. Fully upholstered on all sides. Plastic Shadowline support legs in Black. Frame padding made with polyurethane foam, including a top layer of memory foam. High-gauge sinuous springs provide cushion support. Seat cushions have fiber-wrapped, high-resiliency polyurethane foam cores. Seat firmness: Soft. On a scale from 1 to 5 (5 being firmest), we rate it a 2. Back cushions have foam fill. Pieces are one armless single and two corners. The collection is modular and can be arranged in your desired configuration. Sectional pieces attach via alligator clips (included). Assembled in the USA.