OverviewThe Chelsea is a 12-inch Level 1 all-foam mattress with a Medium feel. It combines layered cushioning, five-zone support, responsive latex, and a cool-to-the-touch cover for balanced comfort.What’s Inside the MattressHere’s how this mattress is built, from the sleep surface down to the support base: CoolFeel™ Pro Fabric: Thickness not specified. Cool-to-the-touch cover material. PillowSoft® HD Foam: 1.25 inches. Adds cushioning and airflow. PillowSoft® Aire: 1 inch. Adds comfort and promotes airflow. Graphite Infused True Response™ Latex Foam: 1 inch. Responsive graphite-infused latex designed to help redistribute heat. True Response™ Latex Foam: 1 inch. Naturally derived latex for responsive support. Foam Core with Ultimate Edge® Support: 7 inches. Provides the primary support base and reinforced perimeter stability. Support Foam: 1 inch. Base support layer. Key Features Feel: Medium Level: Level 1 Mattress Height: 12 inches Cooling: CoolFeel™ Pro Fabric and graphite-infused latex foam Support: 5 ZoneResponse™ Design Edge Support: Ultimate Edge® Support Adjustable Base Compatible: Yes Warranty and DeliveryBacked by Serta’s 10-year limited warranty. Estimated Perrysburg Mattress delivery is 1-2 weeks.