Its pillowy-soft top cushion. Hand-built frames with hand-finished upholstery. Pair with a sofa or other add-on pieces. Engineered hardwood frame with mortise & tenon joinery. All wood is kiln-dried for added durability. High-gauge sinuous springs provide cushion support. Cushion has fiber-wrapped high-density polyurethane foam. Coordinates with Harmony Modular Collection (sold separately). To see the full assortment of potential add-on pieces, see the Harmony Modular Collection page. Assembled in the USA.