{"product_id":"serta-perfect-sleeper-cobalt-calm-12-extra-firm-mattress-11221835","title":"Serta Perfect Sleeper Cobalt Calm 12\" Extra Firm Mattress","description":"The firm Cobalt Calm 12’’ mattress offers a supreme restorative sleep experience with its innerspring design. Enjoy cool, contouring comfort with the Cool Twist® Gel Memory Foam, which enhances airflow and heat dissipation. The PillowSoft® Aire foam layer promotes airflow through its unique, gently rippling design, keeping you comfy all night long. Cushion Quilt™️ foam and two support foam layers add extra softness to your sleep. Experience even more targeted lower back and hip support with the three-zoned 850-coil density system. This mattress is topped with an anti-bacterial, cool-to-the-touch cover made with CoolFeel™️ fabric, helping stomach and back sleepers achieve perfect sleep. Being CertiPUR-US® Certified, rest assured knowing our foam materials are free from harmful chemicals and gasses.","brand":"SERTA","offers":[{"title":"Default Title","offer_id":46741773516977,"sku":"84840","price":583.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0705\/5976\/0561\/files\/S2300084840R00_SR_CBLTCL_12_EXFIRM_MAT_T_116d4f5d-4bc4-4380-b64c-e88484e4a126.jpg?v=1782745011","url":"https:\/\/clearance.cityhome.com\/products\/serta-perfect-sleeper-cobalt-calm-12-extra-firm-mattress-11221835","provider":"Clearance City Home","version":"1.0","type":"link"}