Serta Perfect Sleeper Cobalt Calm Extra Firm Innerspring Mattress

Why We Love This Perfect Sleeper® Cobalt Calm Extra Firm is an extra-firm, supportive mattress with a 12” profile, essential cooling features, and targeted support. Featuring an 825-coil density system, this classic quilted-top mattress offers zoned comfort, pressure relief, and memory foams that contour your body. Cool feel™ 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 indivi