Engineered hardwood frame with mortise & tenon joinery. All wood is kiln-dried for added durability. Lumbar pillows and throw pillows included. High-gauge sinuous springs provide cushion support. Seat cushions: Fiber-wrapped high-density polyurethane foam. Handcrafted. Seat firmness: Soft. On a scale from 1 to 5 (5 being firmest), it's a 1. Back cushions: 50% polyester fiber, 45% duck feather and 5% duck down in down-proof ticking. Pieces are fully upholstered and may stand alone. Sectional pieces attach via alligator clips (included). Cushions are reversible. Assembled in the USA.