{
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  "locale": "en_US",
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    "productName": "Beautyrest Black Series Three Extra Firm Mattress 14.25\"",
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    "consfeatures": [
      "Extra-firm coil support keeps spine lifted all night|Triple-Stranded Pocketed Coil® isolates motion completely|Cooling yarn and Micro Diamond™ foam pull heat away|Self-Response™ Latex adapts instantly to pressure and movement|Tight-top surface holds position without any sinking feel"
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          "title": "Beautyrest Black Series Three Extra Firm Mattress 14.25\""
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        {
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          "title": "Beautyrest Black Series Three Extra Firm Mattress 14.25\""
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          "title": "Beautyrest Black Series Three Extra Firm Mattress 14.25\""
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        {
          "alt": "Beautyrest Black Series Three Extra Firm Mattress 14.25\"",
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          "title": "Beautyrest Black Series Three Extra Firm Mattress 14.25\""
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          "title": "Beautyrest Black Series Three Extra Firm Mattress 14.25\""
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        {
          "alt": "Beautyrest Black Series Three Extra Firm Mattress 14.25\"",
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          "title": "Beautyrest Black Series Three Extra Firm Mattress 14.25\""
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        {
          "alt": "Beautyrest Black Series Three Extra Firm Mattress 14.25\"",
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          "title": "Beautyrest Black Series Three Extra Firm Mattress 14.25\""
        },
        {
          "alt": "Beautyrest Black Series Three Extra Firm Mattress 14.25\"",
          "url": "https://www.sleepworld.com/dw/image/v2/bkcl_prd/on/demandware.static/-/Sites-sleepworld-products-catalog/default/dwa72f4c29/images/hi-res/SIM-/SIM-SE3-5M-XF-24/SIM-SE3-3XM-XF-24_4.jpg?sw=758&sh=485",
          "title": "Beautyrest Black Series Three Extra Firm Mattress 14.25\""
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          "title": "Beautyrest Black Series Three Extra Firm Mattress 14.25\""
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        {
          "alt": "Beautyrest Black Series Three Extra Firm Mattress 14.25\"",
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          "title": "Beautyrest Black Series Three Extra Firm Mattress 14.25\""
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        {
          "alt": "Beautyrest Black Series Three Extra Firm Mattress 14.25\"",
          "url": "https://www.sleepworld.com/dw/image/v2/bkcl_prd/on/demandware.static/-/Sites-sleepworld-products-catalog/default/dw850ae71f/images/hi-res/SIM-/SIM-SE3-5M-XF-24/SIM-SE3-3XM-XF-24_3.jpg?sw=140&sh=93",
          "title": "Beautyrest Black Series Three Extra Firm Mattress 14.25\""
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        {
          "alt": "Beautyrest Black Series Three Extra Firm Mattress 14.25\"",
          "url": "https://www.sleepworld.com/dw/image/v2/bkcl_prd/on/demandware.static/-/Sites-sleepworld-products-catalog/default/dwa72f4c29/images/hi-res/SIM-/SIM-SE3-5M-XF-24/SIM-SE3-3XM-XF-24_4.jpg?sw=140&sh=93",
          "title": "Beautyrest Black Series Three Extra Firm Mattress 14.25\""
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            "length": "79.5",
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This is Beautyrest's most advanced coil architecture in a tight-top profile, and it earns that claim through feel, not just spec count. Every layer is chosen to hold the body in correct alignment from the moment you lie down. If you've been waking up with lower back tension or hip discomfort from a mattress that lets you sink, stop by any Mancini's Sleepworld location and our sleep specialists will put this next to every competing option so you can feel the difference for yourself.</p><p>COMFORT AND FEEL: Extra-firm surface with a buoyant latex lift and zero sinking sensation.</p><p>SIZE: This Twin XL sized mattress is a natural fit for taller solo sleepers, college students, and single-sleeper guest rooms where length matters.</p><p>BEST SLEEP MATCH: Back and stomach sleepers who prefer an extra-firm feel will find this mattress holds the hips level and the lumbar supported all night, making it easier to wake up without stiffness.</p><p>BEST FOR: Ideal for sleepers who need strong lumbar support, tend to overheat through the night, or want a firm mattress for back sleepers that doesn't feel punishing.</p><p>CONSTRUCTION SPECIFICATIONS: Triple-Stranded Pocketed Coil® Technology works head-to-toe, moving independently under each part of the body. Cooling yarn woven into the surface works with Micro Diamond™ Memory Foam to move heat away from the body. Self-Response™ Latex responds instantly, adding a buoyant pressure-relief layer without softening the overall firmness profile. Foam meets CertiPUR-US standards.</p><p>SETUP AND COMPATIBILITY: Works on a platform frame, adjustable base, or box spring with no tools required. Delivered flat with in-home professional setup available.</p><p>NOT A FIT FOR: Dedicated side sleepers or anyone who prefers a plush or medium feel — this extra-firm profile is built for those who want to sleep on the mattress, not in it.</p><p>YOUR SLEEP, BACKED BY US</p><p>Every mattress purchased at Mancini's Sleepworld comes with a 120-night comfort guarantee and our Best Price Guarantee, so you know you're getting real value. Add a premium mattress protector at the time of purchase and you can extend that to a full 365 nights. We also offer free next-day delivery, flexible financing, and in-home professional setup. Better yet, come feel this mattress in person at any of our locations before you decide.</p>\n        </div>\n    \n    \n        <ul class=\"delivery-list d-none d-md-block m-0\">\n            <li class=\"small-text square square__red\">SleepMatch: <span>red</span></li>\n        </ul>\n        <div class=\"delivery-list-content d-none d-md-block\">\n            \n            \n            <iscontentasset aid=\"sleep-match-red\">\n        </div>\n    \n</div>\n\n        <!-- Product Name and Number -->\n        <div class=\"col-sm-6\">\n            <div class=\"row\">\n                <div class=\"col\">\n                    <section>\n                        <h1 class=\"product-name\">Beautyrest Black Series Three Extra Firm Mattress 14.25&quot;</h1>\n                    </section>\n                </div>\n            </div>\n\n            <div class=\"detail-panel\">\n                <!-- Attributes -->\n                <section class=\"attributes\">\n\n                    <div 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