Kiln-dried solid wood frame. Plastic shadowline support legs in a Black finish. High-gauge sinuous spring cushion support. Seat and back cushions are foam and down filled. Seat firmness: Medium. On a scale from 1 to 5 (5 being firmest), it's a 3. Loose, reversible cushions (Astor Velvet excluded). Gel mattress features a 2-layer construction of high-density foam and gel-infused memory foam. It’s 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. Sleeper mattress dimensions run smaller than standard mattress sizing. Steel pull-out mechanism. Assembled in the USA.