Serta Perfect Sleeper Oasis Sleep 12" Mattress Set (California King, Extra Firm) | Supportive Comfort with Durable Construction

Featuring a three-zoned coil design, this mattress offers pressure relief and support where you need it, with a Cool Twist Gel Memory Foam that contours to your body - with upgrades available with more cooling layers and support.Product Features:A simple solution for perfect sleep, every night Designed with zoned comfort for a more restful sleep Cooling gel is swirled directly into a breathable foam designed to promote airflow and heat dissipation This unique design features cooling gel swirled into premium memory foam. This breathable memory foam helps enhance airflow and heat dissipation for a feeling that can only be described as a cool, contouring type of comfort Soft foam provides enhanced cushioning for exceptional comfort and promotes airflow through its unique, gently rippling design Warranty: 10 year limited Includes foam, fabric, coil