<p>Harmony is our most comfortable sofa ever, thanks to its deep seat, plush cushions and go-anywhere lumbar and throw pillows. The spacious sleeper mattress within makes it even more versatile.</p> <h6>KEY DETAILS</h6> <ul> <li>Engineered hardwood frame with slot & tenon joinery.</li> <li>Solid wood legs in an Espresso finish.</li> <li>High-gauge sinuous springs provide cushion support.</li> <li>Seat cushions: Fiber-wrapped high-density polyurethane foam.</li> <li>Seat firmness: Soft. On a scale of 1 to 5 (5 being the firmest), it's a 1.</li> <li>Back cushions: 50% polyester fiber, 45% duck feather and 5% duck down in down-proof ticking.</li> <li>Loose, reversible cushions with zip-off covers.</li> <li>Folds out to reveal a Queen-sized mattress.</li> <li>Gel mattress features a 2-layer construction of high-density foam and gel-infused foam.</li> <li>It’s designed to contour to the body and wick away body heat.</li> <li>Mattress ticking has an ultra-soft, breathable knit.</li> <li>To avoid damaging the frame, do not fold the mattress into the sofa with sheets or blankets on it.</li> <li>To see the full assortment of potential add-on pieces, see the <a href="https://www.westelm.com/products/modular-harmony-sectional-modular-h6266" rel="{'dim': {'width': 800, 'height': 600}}" class="popup">Harmony Modular Collection page.</a></li> <li>This contract-grade item is manufactured to meet the demands of commercial use in addition to residential. <a target="_blank" href="http://www.westelm.com/shop/furniture/contract-grade-furniture/">See more</a>.</li> <li>Make sure it fits! See our guide on <a href="http://www.westelm.com/shop/design-lab/measuring-delivery-design-lab" target="_blank">measuring for delivery</a>.</li> <li>Assembled in the USA.</li> </ul>