This is pure luxury and comfort. The Ultra Queen Mattress is made of high density memory foam which givess the ultimate support to your exact body size and shape. It's perfect for any sleep position. The Ultra offers - a fully encased perimeter for superior edge support. - Medium firm feel for additional back support. - Eliminates harsh contact points for less tossing & turning. - Firmer side rails for added edge support. - Perfect for side & back sleepers. - No flip, no turn, never sags.