It's the Pescadero Point, which is the firm comfort level in the Tropical Oasis Series.  It has 'only' 1.5" of PU foam.  I haven't found any coil mattresses with that minimal amount of PU padding.  It is quite firm, actually more firm than I would like, but it made me wonder if it would be a good starting point for some other latex toppers.

• Exquisite Quilt  Cover  
  • 1.0 ounce FlameGuard Silk/Wool Blend 
  • 1/2" High Performance Flawless Foam
  • 1" Flawless Foam
• Comfort Layers
  • 1.6 Firm Luxury Latex
  • DuraFiber Pad
• Core
  • 1.57" Plush Luxury Latex
  • 1.57" Firm Luxury Latex
  • 5.71" Firm Luxury Latex