The Edge DD9400 Firm Tight Top Mattress delivers cool, supportive sleep with advanced comfort technology. SN 75% cooling fabric promotes lasting temperature regulation, while a unique blend of graphite, copper, and visco foam offers cooling, health benefits, and contouring support. Calm Cooling Comfort gel-infused memory foam relieves pressure, and the Nano Edge 5-Zone Coil system paired with Advanced Edge Elite provides targeted, edge-to-edge support and durability.