Excellent edge foam encasement providing greater stability, a firm seating edge, and a larger sleeping surface. 858 Contour Luxury encased coil system is designed to separately respond to the body, reducing motion transfer, so when your partner moves, you can still enjoy an undisturbed nights sleep. iFusion technology is a combination of open cell memory foam and pressure releiving gel resulting in an optimal temperature sleeping surface while still conforming to every curve of your body. AdvantaGel layer is an intelligently designed infusion of gel and resilient foam that offers a cooler sleep with luxurious comfort and durability. Our Super Stretch Tencel Fabric is a natural and breathable fabric that offers Pressure Relief at the surface of the mattress allowing the sleeper to benefit from the Lift and Reduced Motion below.