Prefer an ultra firm sleep surface with just a hint of softness? With its firm, supportive feel and premium gel infused comfort layers, the Apostle Isle is sure to lull you right to sleep and allow you to wake feeling rested and refreshed. Innovative materials, including MarveLux gel quilting foam, PrimaCool gel memory foam, PrimaSense gel foam and PrimaCore gel foam combine to create a restorative sleep environment that adjusts and contours to your unique body shape for a personalized level of support. Additionally, exclusive IntelliCoil individually encased titanium alloy coils feature a unique coil-in-coil design to cradle the body while delivering the deep down support your body needs. Additions such as a silk infused cover with cooling Outlast technology and the StabiLux HD Edge System, which provides a larger usable sleep surface, makes this firm mattress feel truly indulgent. 10 Year Non-Prorated Warranty.