The Everfirm mattress features a bonded foam core, sandwiched between separate layers of PU foam quilt at the top and the bottom. This triple-layer provides additional support to the body, while increasing durability of the mattress. The smooth polycotton tapestry makes it breathable and long-lasting. It’s Ideal for those who desire both firmness and comfort in their mattress. It also comes with a two-year supportive warranty. Enjoy Kurl-on, enjoy sound sleep.