Simmons Beautyrest Classic Howes Plush Firm Pillow Top King Mattress Features 1046 super pocketed coil springs density for unsurpassed motion separation, conformability and durability Luxurious beautystyle stretch knit fabrics and aesthetics Total surround beautyedge foam encasement for maximized sleeping surface and and sleeping comfort right to the edge Patented foam Transflexion Comfort Technology ensures comfort throughout the life of the mattress Certipur-us comes with comfort and confidence; the flexible polyurethane foam in this product has been independently laboratory tested and certified to meet voluntary standards for content, emission and durability