Hand-built frames with hand-finished upholstery.Engineered hardwood frame with mortise & tenon joinery.All wood is kiln-dried to prevent warping.Plastic shadowline support legs in an Espresso finish.High-gauge sinuous spring and webbed cushion support.Cushions have fiber-wrapped, high-resiliency polyurethane foam cores.Seat firmness: Medium. On a scale from 1 to 5 (5 being firmest), it’s a 3.Sofa folds out to reveal Queen-sized mattress.Gel mattress features a 2-layer construction of high-density foam and gel-infused foam.Its designed to contour to the body and wick away body heat.Mattress ticking has an ultra-soft, breathable knit.To avoid damaging the frame, do not fold the mattress into the sofa with sheets or blankets on it.Reversible cushions with zip-off covers (chaise seat cushion is not reversible).Chaise seat cushion features a top seam.Accommodates West Elm Queen-sized sheets (sold separately).Legs can be removed.Hand upholstered and assembled in the USA.