The Chalais Firm is Jamison's entry into The Luxury Collection — a mattress that redefines what "luxury" means at the independent retail level. At 12 inches, it introduces InfinityChill Cover™: Jamison's most sophisticated cooling fabric, engineered to feel cool to the touch, wick heat and moisture continuously, and regulate sleep temperature without altering the mattress's firmness feel. Gel Cooling Foam beneath the cover adds an additional thermal barrier, while the dual AeroSpring Latex™ upholstery system — including AeroSpringLatex™³ Firm — delivers latex-quality support and breathability that no conventional foam can replicate. AeroSpring Latex™ is fast-responding, naturally breathable, and provides the precise, resilient firmness preferred by back sleepers and those with lumbar concerns. The DualCore Support™ Foam Core foundation provides adaptive comfort on top with dense, high-density support below — the ultimate platform for long-term spinal alignment. Infinity Edge™ design for full mattress usability.