12" WellFlex 1.0 
Experience cooler supported sleep with the WellFlex 1.0, our firmest memory foam mattress.
With a firm feel, the WellFlex 1.0 is uniquely designed to ensure a cool, supportive night's sleep. The layers of Gel and Performance Memory Foam provide added breathability, increased comfort, and extended coolness with the aid of a Cooling Knit Fabric Cover. This mattress also works exceptionally well with adjustable based because of its high flexibility and low depth profile.
Firm-feel
Premium cooling, breathable fabrics, and foams
Perfect for adjustable bases