The Leelanau is our first premium pillow top mattress with our unique innerpanel construction. We start out with our premium Comfortflex continuous coil innerspring with our exclusive Comfortguard side support system. This side support system is the strongest steel encased system in the industry and ensures that the edges will not break down and provides the sleeper with total edge to edge sleeping surface. With the Leelanau you will get a great balance of proper support and ultimate comfort.