Streamlined Support with a Refreshing, Cool-to-the-Touch Feel
The Sapphire ComfortKnit is the ideal solution for those who prefer a traditional, supportive feel with modern cooling technology. At a sleek 8-inch profile, this medium-firm mattress by Jamison balances structural integrity with breathable comfort, making it a perfect fit for platform beds, bunk beds, or anyone seeking a stable, well-aligned sleep surface. 
 
Engineered for Cool, Stable Sleep
ComfortKnit Fabric Surface: The mattress is wrapped in a premium knitted fabric quilted over dense padding. This layer offers a smooth, airy touch with enough stretch to move with you, while the firm quilt construction ensures you stay on top of the mattress rather than sinking in.
Gel Cooling Foam: Engineered for temperature regulation, this specialized foam pulls heat away from the body. It’s the perfect feature for "hot sleepers," providing a crisp, refreshing sensation throughout the night.
ComfortFirm™ Foam: This high-durability layer is the secret to the Sapphire’s "Balanced Firm" feel. It is meticulously designed to maintain spinal alignment and soothe pressure points, offering a solid foundation that doesn't sacrifice comfort.
Essential Spring 390 with 360° Encasement: Featuring a robust 390-count steel coil unit, this system provides the classic, responsive bounce of an innerspring. It is fully wrapped in a 360° foam perimeter to prevent edge collapse and maximize your sleeping surface.
High-Density Base Foam: The structural anchor of the mattress. This bottom layer provides a flat, consistent foundation that ensures weight is distributed evenly and the internal components remain durable for years to come.