The Serta Perfect Sleeper Cobalt Calm 12" Extra Firm Mattress.  Featuring a 3 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 for even more cooling and comfort.

• Coolfeel™ fabric - a luxurious, breathable cover with a cool-to-the-touch sensation from technology that is plant-derived. Our biobased phase change material consists of 53% biobased content and is certified through the usda biopreferred® program.
   
• 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.
   
• Cool twist® gel memory foam - this breathable, gel-infused memory foam gently cradles your body while promoting enhanced airflow.
   
• 850 edition custom 3 zoned support coil system. This system of individually wrapped coils provides contouring, cradling support from edge-to-edge, minimizing the impact of your partner’s movements

• Mattress Top Type: Tight Top
• Mattress Type: Innerspring
• Included: 1 Mattress(es)
• Features: Antimicrobial, Wrapped Coils, Temperature Regulating, Foam Layer
• Additional Information: Conforms To Body, Suitable for Adjustable Bed Frames
• Manufacturer Warranty: 10 Year Limited
• Bed Size: TwinMeasurements: 76 Length/Inches, 12 Height/Inches, 40 Width/Inches
• Maximum Weight Limit: 1000 Lbs
• Base Material: 90% Metal, 10% Foam
• Comfort Type: Extra Firm
• Care: Spot Clean
• Certifications And Listings: Certipur-Us Certified
• Country of Origin: Made in US