Serta's Serene Sky™ 12" Firm Mattress offers Serta's renowned comfort at an unbeatable value. Cool Twist® Gel Foam works to create a cool sleep surface which is essential for a deeper sleep while the 805 Individually Wrapped Coil System provides contouring cradling support. Finally, BestEdge® Foam Encasement ensures that you will not have a sinking feeling at the edge of the mattress.

• Coil count: 1051
• Box spring/foundation sold separately
• Top type: Tight top
• Mattress type: Innerspring
• Comfort Features/Layers: .5" Serta® Pillowsoft® Foam, 1" Pillowsoft ® Aire, 2"Cool Twist ® Gel Foam
• Cool Twist® Gel Foam is combined with a system of individually wrapped coils for cool, comfortable support night after night
• Cool Twist® Gel Foam, cooling gel is swirled directly into a breathable foam designed to promote airflow and heat dissipation
• 805 Individually Wrapped Coil System of up to 805 individually wrapped coils provides contouring cradling support
• BestEdge® Foam Encasement is an extra deep foam rail to help reduce edge roll-off and extend the sleep surface
• Compatible with an adjustable bed
• Warranty: 10-year non-prorated
• Meets federal fire-retardant safety standard
• Made in the USA of imported and domestic parts
• Request warranty information