Advanced Series – A7 Bed Compare to Sleep Number Advanced Series. Known for its exceptional quality and luxurious design, the Elegance Series lineup includes nearly every feature imaginable. These models come with our exclusive, patented, reversible top cover with two sides that allow you to flip over and zip to your center panel. This gives your mattress a longer life, allowing you to spread the wear and tear across two sides of the top panel. We recommend flipping the cover over every six months to take full advantage of this feature. Our patented, zipped center panel design also gives you access to the center comfort compartment. This compartment contains CertiPUR-US Certified Convoluted Comfort Foam layer and a Ventilated ThermaPhase Gel-Infused Visco memory foam layer which makes rotating the foam layers for longer life much easier. You can also swap the comfort layers over each other to give you even more customizability with your mattress. The Personal Comfort A7 bed comes with split foams, giving each side of the mattress its own customized comfort layers. Furthermore, these comfort layers can be easily upgraded or replaced, which allows you to renew – rather than replace – your mattress. These models come standard with our fully digital state-of-the-art pump system. All of our pump systems use a medically recognized pressure scale with 45 unique number settings, from 5 to 50, and measures the internal pressure of the mattress in millimeters of mercury. Our 2-Zone technology allows complete adjustment for each sleeper and our touch screen digital remotes offer complete individualized personalization.