Featuring a 3-zoned coil design, Serta's Perfect Sleeper Cobalt Calm 12" Extra Firm Mattress offers significant pressure relief and exceptional support where you need it, with a Cool Twist® Gel Memory Foam that contours to your body.
Available in 9" standard or 6" low profile foundations
Top type: tight top
Mattress type: innerspring
850 Edition Custom 3-zoned support coil system is a system of individually wrapped coils that provides contouring and cradling support from edge-to-edge, minimizing the impact of your partner's movements
Cool Twist® Gel Memory Foam is a breathable, gel-infused memory foam that gently cradles your body while promoting enhanced airflow
CoolFeel™ Fabric is a luxurious, breathable cover with a cool-to-the-touch sensation
Antimicrobial Mattress Protection keeps your mattress fresh and clean from odor causing bacteria (this product protects the mattress but does not protect users against bacteria, viruses, germs or other disease organisms)
Coil count: 491
The Serta Perfect Sleeper Foundation, constructed of wood and metal, provides the perfect support for your Serta mattress and is designed to provide durability and long-lasting comfort
Compatible with an adjustable bed
Meets federal fire-retardant safety standard
Made in the USA of imported and domestic parts
Woman Owned
Certified flexible polyurethane foams meet CertiPUR-US® program standards for content, emissions and durability, and are analyzed by independent, accredited testing laboratories
Size Reference for Serta Extra Firm Mattress Set
Available Sizes: Twin x Standard Profile, Twin x Low Profile
