The Heartland is a Foam Encased Mattress with a High Density Gel Foam
2” 5-ZONE R65 Extra Firm Convoluted Foam
1” of High Density 1.5 lb. Foam
540 Tri-Zone Spectrum Coil Support System with 4” Foam Encased Perimeter Support and a 3.5” Support Core
The Heartland Firm has tight surface stitching to maintain the firmness.