This mattress from Simmons Beautyrest offers wonderful support and supreme comfort. Firmness: Luxury Firm Pillow Top Quilting: FR fiber, 5/8" PurFoam™ Plush, 1" convoluted foam Construction: 800 Density Beautyrest Pocketed Coil provides motion separation, conforming comfort and support. Coil gauge: 14 3/4 ga. Edge support: Total Surround BeautyEdge with Quantum Lock adds foam rail integrity and sleeping comfort right to the edge. Coil support: 1/2" Energy Foam™ adds greater stability. 5 slatTriton foundation-increases foundation strength and durability. No flip design. Simmons Beautyrest Classic Bakerstand King Mattress Set 10 Year Warranty Image shown is Queen Size Mattress Set with queen boxspring