The Kingsdown Waterglenn Hybrid Luxury Firm Mattress features a multi-level 2600+ piece coil system, with 9" wrapped OptiCoils layered with Micro Coils to provide contouring support while reducing partner motion. Quantum edge support has 2 rows of stronger coils to deliver a strong edge while dual lumbar support with Adaptive Foam supports where your body needs it the most. Coupled with a cooling cover with 4X the cooling power to disperse heat and Silk & Wool fibers to enhance cooling, this mattress will give you a cool nights' sleep.* Double-stacked coils: 789 9" wrapped OptiCoils + 1887 Micro Coils = 2676 Total Coils (Q) provide contouring support while reducing partner motion. Quantum edge support has 2 rows of stronger coils to deliver a strong edge.